Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c7450804720ac9…

MALICIOUS

PDF

159.3 KB Created: 2021-06-30 18:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ebc7fa2facac98243649a31c6bb3bb07 SHA-1: 2260a7f890b0f76ade2ce90384a83b3cdf571766 SHA-256: b6c7450804720ac9cf178a0b9dde55a23d8f2477d347ff9ff062544224338fa6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple potentially compromised websites hosted on disposable domains. The presence of raw IP addresses and links to WordPress upload directories further suggests an attempt to host and distribute malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/ucerkkknqfkrqeen5c6pfcmk9q/dakotutuguki.pdf In PDF document text
    • http://ilovemynewstemcells.com/clients/865932/File/vajisi.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc272784e4---91948256676.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160beaf8810f15---tugutowazadexumax.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847973e8ed9---25604339442.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/dudefumubaturifixe.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/k8jc4jv84a72160j09tppij263/renuzaba.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/73553214709.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/edps7q6lan6c26h23835o2t2j1/45932364642.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/86168368769.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3923a5039---tetonadedegegepitobo.pdfPDF link annotation
    • https://fokusmedia.com/images/uploads/fusovemetibumigup.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/fec4718ea617dfd95ffe60b35a104526/64409476625.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/eg3evacvcvvsvshqqej7gq7c12/47489716502.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771ca966d2c---tipeduwatetelobugatiz.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e72bc2207---50581913485.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160dbbe24208ae---81198604727.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/ee55782a96f761c7c30f776bcb993c93/jozupodotararimafuzulad.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082691167936---repajonunovipopojuw.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/leledomigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=accordance+with+the+lawPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B75A 10364 bytes
SHA-256: cbc4716a4bb96cc1db857428fb475af38cc25647bf0e385cea2e9110661a452b
font_01_sfnt_off0001cebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEBB 17836 bytes
SHA-256: 1592dea56de3a2ad9ee7f4bff1343890000b6ccb62e96fbf2ddb5fff7dc867a0
font_02_sfnt_off0001fd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD55 33696 bytes
SHA-256: 6d9f18374a6e3bd960d5c51c34303b44017fcd04e132c99af78dab254801e331
font_03_sfnt_off00025769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25769 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1