Malicious PDF — malware analysis report

Static analysis result for SHA-256 36fcc7df06e6e961…

MALICIOUS

PDF

69.4 KB Created: 2020-12-27 00:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 995d7de9938fad5eae480a8c96957c30 SHA-1: d014a056174a9d282c76623f4fc6fa443896774b SHA-256: 36fcc7df06e6e961630410f3cf3082906ddb3e74e28a626cefe50440cf3b74e9
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/strik?utm_term=buffalo+wings+and+things+escondido PDF link annotation
    • https://cdn.sqhk.co/taranumota/vggqaVt/21233641350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443329/normal_5fa7a2ae887b1.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/ga8jbhd/man_o_war_steps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_5fd7945dbbf03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_5fa5d1dd76dd1.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/340292b0.pdfIn PDF document text
    • https://cdn.sqhk.co/nafumozuwe/Bjeiaia/master_barber_shop_pomona_ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/39930383549.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/last_wish_guide_datto.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/vasulolutapepisu.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/50980622416.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/the_midnight_songs.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_off0000cf95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF95 5328 bytes
SHA-256: 97d19032fc68d36be5a40caff6d1585c1c4e96e2d83f2e74d871f0938f3e318f
font_01_sfnt_off0000e1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CD 10980 bytes
SHA-256: bfc55bddce225a3f195053ed267e9144d6a0e145781d4cce4c623e0521872648