Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e36b89f90beda9d…

MALICIOUS

PDF

67.6 KB Created: 2021-09-28 12:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7295b35171888824bb96a12cc2629ebc SHA-1: 590bb6eb0a6e2d22c514ee220b5eb9230b0122a4 SHA-256: 3e36b89f90beda9d1dd5f8bc8ebfbc1696e9da5f8a3f634990c097e1549809f6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous links to external sites, some hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://habibitours.net/ckfinder/userfiles/files/93969625919.pdf
    • https://faktxeber.ru/resimler/files/45326751174.pdf
    • http://nwatchonline.info/userfiles/file/6233619309.pdf
    • http://churchtextile.com/userfiles/file/23475554367.pdf
    • http://lammensfilip.be/uploads/files/wijipikelu.pdf
    • http://macierz-grodziec.org/files/file/85630011819.pdf
    • https://triyoga-tv.ru/userfiles/file/83474999980.pdf
    • https://slavicchurchmississauga.com/fck_upload/file/69294524719.pdf
    • http://bluecars.pl/userfiles/file/sitogusu.pdf
    • http://kehlux.lu/userfiles/files/kovuw.pdf
    • https://micsys.in/userfiles/file/guborekorakirakelelor.pdf
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/47368069183.pdf
    • http://taxilitomerice.cz/ckfinder/userfiles/files/88274105834.pdf
    • https://biographiewerkstatt-singer.de/userfiles/file/vinatotoperipukaxureba.pdf
    • http://otworz-biuro-podrozy.pl/userfiles/file/duvakesapegurusug.pdf
    • https://serpavenger.com/ckfinder/userfiles/files/13941399909.pdf
    • https://healthmatters.me/userfiles/file/nuzugazaxazunokuroxaroli.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ede056eb3---vekatifalenuvoxemakojav.pdf
    • http://annamsaigonlaw.com/upload/files/85008253203.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/h7ujbpjljmhr9dpko3abk3413u/zakipegomexotewij.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321a4ad391e---lunarebasabe.pdf
    • http://nerezove-kuchyne.cz/UserFiles/File/dosogetixo.pdf
    • https://bazab.ru/ckfinder/userfiles/files/gozamobanatorubatupuvu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=all+pokemon+gba+rom
    • 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_off0000ae9c.bin
da51ef5fe63986765cc2368e797bd5d065d617cd5fe7a8320c0e47147470bf99
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9C 14248 bytes
font_01_sfnt_off0000d1e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E7 16792 bytes
font_02_sfnt_off0000e9fe.bin
b389674dcd82cb2352975b8e0d43a73e97822399037ca626977f78752addbe22
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 10452 bytes