Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e93fd3605871ee3…

MALICIOUS

PDF

86.7 KB Created: 2021-06-30 01:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d8c0b89150e043474252815bbebab045 SHA-1: 54234b68a9dc6635423a23d6ffb1c577dad2d4a6 SHA-256: 7e93fd3605871ee39d964da389953febd65b85374ded2e25f918b2d5e3cd198c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a specific ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains. These links are likely intended to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://akemi.ro/hirek/file/vakijizetarud.pdf In PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb2823d00a---ruguralunekiwaxobuw.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160746b3f16d08---gilimozotoluwogopoxe.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c0b78144c---zupejepekoredok.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/3868254134.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/27380120734.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/7cc905cb12afa261a7f5d0e56fc2f8a7/85263737883.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/fb0a0282acbdc6efb4253ce1c8820b6e/67927150970.pdfIn PDF document text
    • http://mebco.ru/images/file/tigabojuvugazubewipij.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b068b891dd---57724292278.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079999e3bcf4---fuvogufamas.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/227a945eeeac001c25836a3d2f44a861/zovik.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ac8fec675---40043291678.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/66ffd606383ed0f75153ca2d0f90f057/rolowijevekore.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/pdfrdlcempldvlefgo6uhq1cfa/83389502029.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16085625023b1e---78332674436.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad9bb8105---51581480221.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/demovanajofozeniwo.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/b61ee302059f18aeb884223e38cc1802/14355587242.pdfIn PDF document text
    • http://esistore.de/userfiles/file/fizugofiti.pdfIn PDF document text
    • http://stevis.cz/files/file/12994415627.pdfIn PDF document text
    • http://topas.lt/userfiles/file/kapitufaru.pdfIn PDF document text
    • https://tonitomov.com/picture/file/74399030905.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/nekuruludavegubuv.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6935bca210---mejadexizo.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/1ujcr6nrnnbhvls56v7oq0vdd2/74857232959.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ab16bed52---tezabusimonumazotenerap.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/41118346465.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=practice+book+grade+4+answersPDF 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_off0000eead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BF 17308 bytes
SHA-256: 037db69dff39f4f76c9265682006c553b49fb84780157c00255f349b42992a57
font_02_sfnt_off00013424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13424 10896 bytes
SHA-256: 7f5900dead8ad52a80f174f8447a0080c816dfa9c68c0e8a381858b9ef53638f

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