Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cdbcb0c0bcc901…

MALICIOUS

PDF

90.2 KB Created: 2021-01-24 01:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6ab758847136736ca55c9bb036dc67eb SHA-1: 7c500cb69c9dc8bdefcb369eaaa079af8a11a631 SHA-256: f0cdbcb0c0bcc901d081be9e6f2c5313ec1041e6bab3f81f34144139ba883f0d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics point towards a malicious document, likely delivered via spearphishing.

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 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://traffset.ru/123?utm_term=1999+palomino+pop+up+camper+owners+manual PDF link annotation
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/dixud_gevakijuzedez_gowojifaxareva_nujajejoxosero.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486994/normal_5fc8c7f7f024e.pdfIn PDF document text
    • https://nuwebobejope.weebly.com/uploads/1/3/1/4/131407692/63b01d877.pdfIn PDF document text
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/pomobi_jojoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383586/normal_5fe6f8847b516.pdfIn PDF document text
    • https://sukurexu.weebly.com/uploads/1/3/0/9/130969838/wiwuriraluza.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://puwagof.rf.gd/forex_charting_software_free.pdfIn PDF document text
    • http://kinapemib.rf.gd/bruno_mars_grenade_fakaza.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/bonduel_equity_market_report.pdfIn PDF document text
    • http://jifigazanovew.epizy.com/urbanization_problems_and_solutions_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/botuwuredeginolevuli.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/wow_dwarf_heritage_armor_guide.pdfIn PDF document text
    • http://wokoziguroron.rf.gd/13265602549.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/61064254438.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/article_370_amendment_bill.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/all-_in-_one_wine_bottle_mockup.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/1045816059.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/tobusaw.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/24962390282.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11361 5084 bytes
SHA-256: b12be08d30e4462a18159b9da31c435082fdd19f6df7613f77ec2b862e511e2b
font_01_sfnt_off00012496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12496 12296 bytes
SHA-256: 944aa70e9d24b795ddba7df0bb7a85f3d29cc0f835c88531da5e1235f32a290c
font_02_sfnt_off00014cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CFB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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