Malicious PDF — malware analysis report

Static analysis result for SHA-256 1972570831cc3676…

MALICIOUS

PDF

94.7 KB Created: 2021-06-26 07:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2765522652059f7bf0812a21a85b5c9b SHA-1: 94f18f266d21889ae4c5a4f18f64bc1c941e2226 SHA-256: 1972570831cc36766571fd79c69bc92a873a96e52f45d3a6f6d85f0c644887b6
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. These links likely serve to redirect users to phishing pages or download further malicious content, aligning with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/46f313e86e874c27d50245c04b208ee1/moladopefimepoke.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/7s5mpfb46ugq94dlo9hv760igd/58195573718.pdf
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/c46f4b730e762e44296ee1f709a57841/nibubunepovijib.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/d4cvluberq2snru9amkrnhtkv8/bozezup.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae627b7ab83---2337746788.pdf
    • http://nitexprofi.cz/userfiles/file/7857118704.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160c2205d5aca8---lizusefarofuxexivoseg.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/mrv0m4qft3roihgeb0kd7et7h6/gifofe.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7744864c6---59803637900.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/47bdb755876f6e121583653f4dfffd59/xavanigaguripubesego.pdf
    • http://playbabydoll.com/userfiles/file/lajafutububulizejokunegix.pdf
    • http://alnadaoil.com/userfiles/file/4361770981.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160795a90e20c7---25254986042.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6c70d695---49089403632.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890643effe5---21779603188.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3038876ac---zowabodimigekilaxukitud.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608257bf358e9---refijuwupixifodenux.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dd753e705---5135627415.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d6862bc4606---nixorekurebabakutomakowug.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/f186ejsbaqri9bmb6l12gga9nl/15638525622.pdf
    • http://billedbutikken.dk/articlefiles/file/80198739850.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ab733f79e---26945159978.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=kick+off+for
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114CB 16792 bytes
font_01_sfnt_off00012ce1.bin
fab02e0f3c99c0060d347acfac94553bfe793bae42acdbe070e54f59af6fac5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE1 9700 bytes
font_02_sfnt_off00014210.bin
f6011be178b461adfa1dc29b3453050988207e955964030e6aa84b18af6c7968
pdf-font-stream PDF embedded font (sfnt) at offset 0x14210 16912 bytes