Malicious PDF — malware analysis report

Static analysis result for SHA-256 80014d7141204592…

MALICIOUS

PDF

87.8 KB Created: 2021-07-29 09:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37e8364cd54d188602adfe058562836c SHA-1: ec7579ef091328607235b0a7a80b5385d43f8ebd SHA-256: 80014d7141204592cb702a0c02f41b259fa9606808a4bb0bcc8eeaab704799c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to lure users to malicious sites. Although no scripts were explicitly extracted, the nature of the URLs and the detection names suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://nvsrolko.org/ckfinder/userfiles/files/nenusafukiwurizizagirobe.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/0vc6kvjaviqrm073erlhqe3h7g/bawed.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/traudle4uh0a1ic57t0ge31f00/maxegotafavi.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6149d9aa---29501178367.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/27513216034ddbe78beca88e2aabe0bd/59927519954.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/475c592fe648fa5a503ff09f31487078/pefukiliku.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/73kg7krtmp4v8i8c3asc2csk34/83964719850.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/a153c453096dce868bdea70b4e8fd254/suxudiwexebadevupilidulu.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb5cc31f27---lubifovexewar.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/ee0aafa5fb52a3a003488f6adaa75490/basutok.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/1acc5bec7cde02f1de16ff6582fb2ac9/49537535760.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41f2b61fc---maxuredadevogoj.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d219c8729e---tizazebuvisorelufezi.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e926c1f854---tarorijinigesukegorabapuf.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/0d9b106cd2e224793701ac8e72b6b056/tisovu.pdf
    • http://fsgpj.com/upfolder/e/files/20210708065234.pdf
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/bb975999388d280e5f8f3a55025fff83/4112084846.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/k5rl7mt97e7urlblqndggsun76/wexitopofutedege.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/bbc2318af5916909c20cdd9098a9977b/19815837949.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160828934abea5---1997416706.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/29931d640402e422f9f6ecc60f3cb7e5/12003736774.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f28aa4ed3c---lexevide.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c128b82547---15444923909.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160738c23f0a96---78614970695.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=bile%C5%9Fikler+ve+form%C3%BClleri+7.s%C4%B1n%C4%B1f+test
    • 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_off0000f067.bin
4005b7b8da50c7466e0a93a39f2cb798483613850d050b57c56f9a5afec2769f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 18648 bytes
font_01_sfnt_off00011e1c.bin
eefb1ac8017fefef7b2f48739ea9522b4b6451fb458ac443f649e0a5dc16c96d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1C 11020 bytes
font_02_sfnt_off00013741.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13741 16792 bytes