Malicious PDF — malware analysis report

Static analysis result for SHA-256 9001bc70b52d2b5f…

MALICIOUS

PDF

78.7 KB Created: 2021-01-20 02:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7a3814af1698377cc34ef791f7eff5b8 SHA-1: 9fdd525a0713e9e59946b938936993ee71c269aa SHA-256: 9001bc70b52d2b5fa41664aad7faf8b6d5d7d58790265298b73f6fbcbe6a131a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links pointing to disposable domains, a common tactic for SEO poisoning and phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links likely lead to further malicious content or phishing pages.

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://trafftec.ru/wb?keyword=boo%20berry%20cereal%20commercial PDF link annotation
    • https://tusigidufamem.weebly.com/uploads/1/3/5/3/135350313/e5a0e22e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449602/normal_5ffc5f835d6c6.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/9912aaf027fae.pdfIn PDF document text
    • https://sibujoxosuzeru.weebly.com/uploads/1/3/4/4/134499285/91daf0646ad24ad.pdfIn PDF document text
    • https://cdn.sqhk.co/fepixuzutol/w2if9XP/74426987298.pdfIn PDF document text
    • https://site-1176622.mozfiles.com/files/1176622/xavix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5fd7eed3a43e7.pdfIn PDF document text
    • https://kobafanosige.weebly.com/uploads/1/3/4/0/134016660/4072732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8ab7b67399d.pdfIn PDF document text
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/zosategejuxaz-gexosuvizasal-xosapibekowev.pdfIn PDF document text
    • https://site-1173349.mozfiles.com/files/1173349/pay_slip_format_excel_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467601/normal_5fe6e29c5f84e.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/gcyXzha/gojolaforebisagufekuwid.pdfIn PDF document text
    • https://junobinedutuki.weebly.com/uploads/1/3/2/7/132712306/dukisumir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492575/normal_60075683f203e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5fe8248617edc.pdfIn PDF document text
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/zupolixix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C3 4660 bytes
SHA-256: debdb9d5cf13a3d3565cca340b8770aad04bf70b0333776386dda76a64028e3f
font_01_sfnt_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 11212 bytes
SHA-256: 7732cd0e7115fb7dc4ad45986cf04c485f79c233fa11eadd48e624654d875050
font_02_sfnt_off00012002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12002 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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