Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbad1eab811b3d19…

MALICIOUS

PDF

95.3 KB Created: 2021-02-16 03:24:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c274f6b9611fab3b16ba3c9b8ac17f85 SHA-1: b846c35d8f0c0cc7c953ddcfca2bdbf425e5d2d1 SHA-256: bbad1eab811b3d194489ae9c6f6650a798936fde111673bde6dbfaafa34dfb42
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the document's structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/aws?utm_term=i+think+you+are+so+busy+meaning+in+urdu PDF link annotation
    • https://cdn.sqhk.co/pojimisuso/dGtHnha/fufofefiraralonoladasejot.pdfIn PDF document text
    • https://vagewojevibo.weebly.com/uploads/1/3/4/8/134873572/4957121.pdfIn PDF document text
    • http://wogaxuma.22web.org/belling_double_oven_user_manual.pdfIn PDF document text
    • http://kisoxowizupoz.iblogger.org/canon_eos_utility_ver._2._6.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/ejeMjYT/zipiwumutibifid.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/lapojatuviniv.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/2021641.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/hhj5ENy/mufejibabaseladewanidope.pdfIn PDF document text
    • https://xuxoxipabixu.weebly.com/uploads/1/3/4/5/134588436/kuvaxug.pdfIn PDF document text
    • https://pugufatafa.weebly.com/uploads/1/3/5/9/135967981/ce07e.pdfIn PDF document text
    • https://neverazu.weebly.com/uploads/1/3/4/9/134901342/taziwulejadulujami.pdfIn PDF document text
    • http://menetufebev.22web.org/video_compressor_software_crack_free.pdfIn PDF document text
    • https://bumozirejukije.weebly.com/uploads/1/3/5/3/135340746/6580a33612.pdfIn PDF document text
    • https://cdn.sqhk.co/mofinopedas/gjFlifW/patibat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxokumixopo.epizy.com/gepumobe.pdfIn PDF document text
    • http://pamajaxa.epizy.com/nufodul.pdfIn PDF document text
    • http://rewezaxow.epizy.com/kubaxaweruxuwokuj.pdfIn PDF document text
    • http://jegudorutomowur.epizy.com/whatsapp_karna_hai_abhi_isi_waqt.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13697 5452 bytes
SHA-256: 93cd6b56d2bffcbbf338c4cab873f918f79c148bdfb2ec43bfcd42390afcb170
font_01_sfnt_off000148f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F3 11352 bytes
SHA-256: e5c52900a7e512705ecfb4cd53fb0011f450d12f51596f63e8b1078ac5ae384b

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