Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab6b83ff4759f0f…

MALICIOUS

PDF

74.5 KB Created: 2021-06-11 18:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 70d9365aa3564a992192aefeb14f2895 SHA-1: 1dbd6e8f51cae9cd1e83fd7745748401d2401192 SHA-256: 9ab6b83ff4759f0ff77d726faa06e11bef7556e599d1e640113427bcc3b77a6f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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://philabc.ru/pbw?utm_term=lion+green+screen+video+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421366/normal_5fe4b9241385d.pdfIn PDF document text
    • https://forelidik.weebly.com/uploads/1/3/0/7/130775511/7143539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_601d3d30d4a0a.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/sefekajaxami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_60563bb9d77eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5fd79e09cfe20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501201/normal_604863dc98359.pdfIn PDF document text
    • https://nomikevokatipo.weebly.com/uploads/1/3/1/8/131859895/5405368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409628/normal_6016101f3ab64.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/rakojagi.pdfIn PDF document text
    • https://ponokexagetax.weebly.com/uploads/1/3/4/3/134326843/44e0471010.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/wesidurosodipij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402000/normal_5fe37eeaab60c.pdfIn PDF document text
    • https://wawotisusuwo.weebly.com/uploads/1/3/2/7/132741293/rotagudato-wuxawafikurina-fetufilug-fapivabesug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najapenoz.pbworks.com/w/file/fetch/144542448/rudekenusorivofir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be390e6-2c49-4ed9-9437-6d4f0188a350/virginia_woolf_movie_nicole_kidman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9acd55e3-d734-467b-b86b-92fbecff3468/51093222728.pdfIn PDF document text
    • http://risoxef.pbworks.com/w/file/fetch/144454056/how_to_use_bose_321_without_remote.pdfIn PDF document text
    • http://jubujefaj.pbworks.com/w/file/fetch/144625494/rabagikasezunenu.pdfIn PDF document text
    • http://xivoxibuza.pbworks.com/w/file/fetch/144742650/68188148433.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_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 5284 bytes
SHA-256: f219dcd9b2d9a4832464e17394ed1b91fac977a9f0e6d456466c97b85cf3e371
font_01_sfnt_off0000f6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AE 10680 bytes
SHA-256: a9812e970142492e61b07c1a7556ef14e92504bd5077f6711f86962ce6b8875b

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