Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32613848a8f7e64…

MALICIOUS

PDF

74.7 KB Created: 2021-04-02 09:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e16980147f14da01cb879d41f6a41879 SHA-1: 02f50f5f0bc44a7056013f4e05621c179c7f5409 SHA-256: c32613848a8f7e64247934bc7099ef72ad7ddd3e43b81b7c9a05c312e22979e7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to domains associated with link farms or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

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://mezovuduw.ru/award?keyword=pengertian+boraks+pdf PDF link annotation
    • https://resonorur.weebly.com/uploads/1/3/4/8/134874279/bc5ec0173918fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472486/normal_604b35cd7911e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453100/normal_601912a7d7310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_6052609e5e728.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/5447462.pdfIn PDF document text
    • https://xafukulirodut.weebly.com/uploads/1/3/1/3/131379356/ef0f415fa5917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_60545d9bd2d3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_602dcee8c47ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446016/normal_6056546232056.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382638/normal_6003c1b8ae95a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_6032b443913b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417652/normal_5ff19659ec40d.pdfIn PDF document text
    • https://kuvugelovusilu.weebly.com/uploads/1/3/4/4/134437140/waburoranewipi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490738/normal_5ff13eb403eac.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/d5f43c92-429e-47e3-bcd2-9a718d27b4fa/life_books_to_read.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01cf1867-1140-450e-9ea2-e14a8033bb9d/interview_questions_for_middle_school_counselors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17dcd0f-c3f8-496f-9e0a-9d0db34af2b9/zabupofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1adbc5ff-3189-4806-b44a-555b403c94e8/wuvosarodovakakosesafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57eb914-eff3-4839-95cf-b31404a5e52b/rujuripagegovuvalogel.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_off0000e688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE688 5380 bytes
SHA-256: 5d12a24cbf3b2604e790709ece13a13a6e4e9c839b4697bc42e4532b2cbda878
font_01_sfnt_off0000f8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E0 11068 bytes
SHA-256: b117348162e448c2b5ff71d053de34eacf41e44819308172053cb29b77a2818d

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