Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbd32d4ce972c11…

MALICIOUS

PDF

87.6 KB Created: 2021-07-14 07:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4e0d97386c5a5484bfc5a3ef0abc03cc SHA-1: f392885299935ceecb77c792f0205dea67c9f4df SHA-256: 0dbd32d4ce972c113d2c53c66bcbecf2dfd8e75fceb2e592def614364d2b2d36
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Harvest Credentials

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to various PDF files hosted on potentially compromised websites. The presence of an MFA/one-time-code harvesting lure strongly suggests the document's purpose is to steal user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://dtpokebar.com/uploads/files/87076103046.pdf In PDF document text
    • http://kursadowicz.pl/Upload/file/40111633220.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/77165487354.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607005c622112---lirukubusibegabotogudetav.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/p6qoqf0oh6j4dc7nh7pb8i36u1/58369279574.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/21ab591f261d538ff879ba976e9e9aa1/91498443168.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/9c1aee2bf109d45f91bf1c94f91ae384/fusuvufojavizijajetajute.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/8tkuqtep09qcu7f09gs04jjrti/81092792995.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb5d2d5354---9848602643.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/97103100373.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/lewibena.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098b9e65c7d2---72526007702.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/dimefulexapekezimukotivet.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/a933259c004f38b39585ef3112c8bce2/karobajedenamenonimotut.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/repagotadawafunaxumurifex.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b5961ac9d---98360621778.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/bc544a1f833df04826a1be93710854d9/98789049367.pdfIn PDF document text
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608061826dc7e---34678187126.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/q1otrrcrv56ilqro4958kpleml/36091537941.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/ba1542e1ca871eb40a0fcd4491311557/fatikavasarage.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/rucd23055rfvarajvonshocvk5/vexatufusixigeloziveluf.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/75159021964.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/f53d213bab21af47f9096fbab2abc0cf/44544235536.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcfaa3c6ab---redewaz.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/vosewefev.pdfIn PDF document text
    • http://flambotour.it/themes/userfiles//files/78456489861.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=if+you+delete+your+fortnite+account+can+you+get+it+backPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF094 17120 bytes
SHA-256: b6db0d924c908a03fdd91428f929919b541456808cede943cd06c4369f372423
font_01_sfnt_off00011d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13555 10880 bytes
SHA-256: 81fdb1f7dc47b4e5b5d8884757914420337bd8819d658977b822b3ce6c500ba4

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