Malicious PDF — malware analysis report

Static analysis result for SHA-256 62eae0cd2dc83fd1…

MALICIOUS

PDF

80.4 KB Created: 2021-05-30 09:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 75f068fe0d832d2b08d0be2df829dc10 SHA-1: bcf17c9fc987eb2edbab5d017755117fc409e68f SHA-256: 62eae0cd2dc83fd13cd080bd64d4b952752981f9371661ee4cf68b3b3fb2edb7
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=hulu+plans+cost PDF link annotation
    • https://moxujudafetofa.weebly.com/uploads/1/3/2/7/132712376/gezerara_fatez_foxuberimupejo_nusazunatomeru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392861/normal_5fdd1c7d84721.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466398/normal_6006316ca8e6f.pdfIn PDF document text
    • https://wisokovunali.weebly.com/uploads/1/3/6/0/136051549/buzuz.pdfIn PDF document text
    • https://jugunita.weebly.com/uploads/1/3/4/4/134440710/ruwolapibamib.pdfIn PDF document text
    • https://zukedobawalot.weebly.com/uploads/1/3/4/5/134526307/fagababisabo.pdfIn PDF document text
    • https://fazatirogefo.weebly.com/uploads/1/3/4/4/134462354/lokijifex-gifuteluv-lipojoni-waneliwewipomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_6028be1318ae4.pdfIn PDF document text
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/xojededer.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/pezemokexowilokal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_6017a8a3e26f8.pdfIn PDF document text
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/4375209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459025/normal_60075405a7377.pdfIn PDF document text
    • https://kigefewapese.weebly.com/uploads/1/3/4/5/134528385/fb44c821d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446776/normal_60293d7753d56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_6029c99a8ba31.pdfIn PDF document text
    • https://noduxexoretan.weebly.com/uploads/1/3/5/9/135993764/632dbf090f807b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454425/normal_605a6a5e2abb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/953a0d3e-e756-4653-b823-e1e7eb55f038/is_star_citizen_ever_going_to_release.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5919ffe3-8b98-4e82-bf0d-6964cee4aead/fabovebawutudumurepazuwew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7be850b-7658-4b7a-b376-081a10f291d5/xanathars_guide_to_everything_magic_item_tables.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_off0000fcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD5 4792 bytes
SHA-256: 7cf24115934c71f53d9b528497446c43d271d0750d8de9e7f85d3950d4da4e7b
font_01_sfnt_off00010d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 11476 bytes
SHA-256: b482751e3d5bcf18c24a830a51dab47719cb2e1141e30e6a7be85e1599131657