Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0e6f651c2a45a5…

MALICIOUS

PDF

86.2 KB Created: 2021-07-18 07:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3efb11fd8e93c2038bf53096d928a72b SHA-1: 1e6eb7856ddf81cb0d5c8d6da6bc6c13b72e18f8 SHA-256: fa0e6f651c2a45a584999603eea7f1027c23269353fd9d0a8bb150ea8f082ecd
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://thangmayedex.com/webroot/img/files/berepev.pdf In PDF document text
    • https://cleaner.pl/userfiles/file/vivenajov.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/31842130055.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f12c236cee---polabex.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086e3af127a6---55377148520.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1626562005.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/147a15672cff9abe80c88e5d526cffbc/26946865520.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ev1kj8a1d8bneb27telvvd9kl7/faxuxotopuxedixated.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/hqa2lq53cpsqjd54ff9fg18ps4/sokojibisadot.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7ea56b893c---13918509355.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/37099453177.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/c66c9bf1d01f021e27b02a70e6561c59/93822591447.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/77f82dfd9aa54a2950e634df9c6caea3/fevesafegakuz.pdfIn PDF document text
    • http://owtsreunion.com/clients/e/e7/e717deb27d844c69ffc49b2d3c0bb1a5/File/30357741535.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/55402058830.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/sijidad.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/f05bfc7f39b0c6abf1e2f76785dd86d2/ralubegonofonizaxugofu.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/54779073925.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/3221585e4cc5dbad00b7435891eabd86/jewikalipanejixudas.pdfIn PDF document text
    • http://stolocatering.ca/clients/874514/File/45218755942.pdfIn PDF document text
    • http://charivne.info/images/file/fazibulukatefexomugofod.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///bazarajagok.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/cdf1da5530442b19cf7f92705cd04657/82304328609.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607655af036d9---5192320205.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=can+you+clean+leatherPDF 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_off0000f00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 10312 bytes
SHA-256: 4471cba076e292ef29f890c85e8bda26777b0de92bd1de9de31be2a8dc54d35e
font_02_sfnt_off00011f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F65 16996 bytes
SHA-256: 8072682c2f076a3af6c4e0fd0f53fd17097f265400e8150c152e9c64b2c53890

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