Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1b3329491ce3b1…

MALICIOUS

PDF

89.2 KB Created: 2021-07-20 11:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1ab5d964de25143238cac976678974d SHA-1: d33ece78bab759c6a45223464dc8ac890f96033d SHA-256: eb1b3329491ce3b1d7cf02cb7d61e664e99725435d2a379187dabd3099862bfd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. This pattern suggests an attempt to distribute phishing content or further malware payloads.

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 https://laser123.com/geektic/files/54498481410.pdf
    • http://aliglobshop.com/userfiles/file/83164812871.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/th9hlnopmoa6cj7t04lhhsp3lv/44737735747.pdf
    • http://jucal.es/images/file/detenipunejaruj.pdf
    • https://graveyards-fuj.ae/userfiles/files/80859035552.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607c46b456ad8---buvezuzov.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/0f688ct45lqmpqienoknkmr1t7/86814348038.pdf
    • http://tryinvest.eu/userfiles/files/zogosodalarapufelexuzozav.pdf
    • http://englandmatchshirts.com/assets/file/koniwimofonatuji.pdf
    • https://alrukn.co/userfiles/files/lazafulaz.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c66065a118---dokuwiviwavupefife.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c520770f4836b75acb68ef98ed04a277/55279422781.pdf
    • http://fapannimario.it/userfiles/files/49146369906.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160984be644dad---70664005519.pdf
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/aec5db4a0cfebc180b3065f6d967716c/ledejowajero.pdf
    • https://dalnoboy.com/data/filestorage/upload/files/55617900345.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/a64604165f52f945d26fa15d79f12980/baguwibunegoligozono.pdf
    • https://addsfly.com/userfiles/file/18158300618.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bd9103c11---nabetugaxedekonorov.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3fddf3410---matejelotebufataroxujazi.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d4638ca8be84bfc16e8faf6778b513bc/45966632765.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/nlajbh09qjdgkl1kp7mcoe6soj/zegijezom.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086044919cc1---rawosatafomufakeb.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756243c8e2a---kutekodobepada.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=tenant+at+sufferance
    • 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_off0000fded.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDED 16792 bytes
font_01_sfnt_off00011604.bin
33edc4b4e0b17744d0445ccd4918ed34a892514ae836b568c90129f51d5250f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11604 10136 bytes
font_02_sfnt_off00012cd0.bin
a3c33f995f7ee2c6deb70802982ce1f8d8a8fc5bce21cc4d106c0ae23faaf0e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD0 16580 bytes