Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd9157b71255393…

MALICIOUS

PDF

81.8 KB Created: 2021-03-14 03:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: fccc3bf37896522ea36b671b4ff3fcf2 SHA-1: ad9a7edeb53464e03b993b080e6c57125f261fb5 SHA-256: edd9157b712553930e1aa03f5462841dd1418a47f8eea8bd32b830cc769a9e8c
194 Risk Score

Malware Insights

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

This 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 document body, though truncated and containing metadata, suggests a lure related to a 'bill of sale' to encourage user interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xezojetit.ru/award?keyword=illinois+motor+vehicle+bill+of+sale+pdf PDF link annotation
    • http://fabermanufacture.ru/4539408041760wq5.pdfIn PDF document text
    • https://bipilebel.weebly.com/uploads/1/3/1/6/131606150/4027520.pdfIn PDF document text
    • https://zuvofuguwapu.weebly.com/uploads/1/3/4/0/134042474/wezedis-veximukadipet-kiziduvebofoj-wixilejeta.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/24awjgp/dead_zed_2.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/b0b7a48c823e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_6031ca93547bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503791/normal_6047f96a0ed5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451368/normal_5fd1103c905fe.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/Djhjgie/70296255813.pdfIn PDF document text
    • https://cdn.sqhk.co/webunojixisa/ifZTXq3/bal_hanuman_movie_all_song.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/aythchc/rilaxejedafugajuzaximozig.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/5584150.pdfIn PDF document text
    • http://smartcoin.design/vector_full_apk_indirljm52.pdfIn PDF document text
    • http://freefire-gifts.com/japanese_alphabet_chartwnp1v.pdfIn PDF document text
    • https://cdn.sqhk.co/gitopedevid/hdiihc0/funny_message_alert_sound_free_download.pdfIn PDF document text
    • https://norudajesopoz.weebly.com/uploads/1/3/4/3/134340776/xosirovigifipo-mepegilu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_6e38a6e9d1714bc68d1502176232f26c.pdf?index=trueIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_99ab5ba62f1d4b1281c39dbab6e884b1.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_0b4c3280f2c94f3a9cec242cc6ccba1a.pdf?index=trueIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_159f9c12d6354211bdf0e358db232371.pdf?index=trueIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_ec0f95b9862445399d8d56bb93e9b55f.pdf?index=trueIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_6b77f2125a1648e9815874093a620a84.pdf?index=trueIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_8dbc84ed0ca9496f83a029a4d03b4e76.pdf?index=trueIn PDF document text
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_b178070b8cb44d36bed11c52737ab2d4.pdf?index=trueIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_3e50c0d2153d463aa1cd1a9f189d6bba.pdf?index=trueIn 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_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 5532 bytes
SHA-256: 3fe7a15ecc36de2f683c9636eb2f15d4b43a8029c733610d6a9cef0a53ddf90b
font_01_sfnt_off000112dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DC 10716 bytes
SHA-256: f6ef13fea51b4cf3c0bdf8ffab3dea74f8573f94f16932523f45f7c6d2b6a444