Malicious PDF — malware analysis report

Static analysis result for SHA-256 f366faab9d0958d2…

MALICIOUS

PDF

81.9 KB Created: 2021-02-28 22:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3c9818e343a2b74ad436c3fea83f0821 SHA-1: 31315b2f862ccaa6ce1ac1bebf832faba36dbf21 SHA-256: f366faab9d0958d2d15976ec078aca417ed5f0b80767f9ea250eafe856eb3815
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=ice+cream+makers+best+buy In PDF document text
    • https://tarutugiwom.weebly.com/uploads/1/3/5/3/135326066/9436689.pdfIn PDF document text
    • https://fetazudumaveber.weebly.com/uploads/1/3/4/6/134615608/6481638.pdfIn PDF document text
    • https://buzoraxuv.weebly.com/uploads/1/3/4/3/134366179/rewapugufulebagusuda.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/xigomupuga-razax-lujunuza-nutuponowume.pdfIn PDF document text
    • https://sibozigoguxo.weebly.com/uploads/1/3/0/9/130969143/9371800.pdfIn PDF document text
    • https://nofuxufemi.weebly.com/uploads/1/3/2/6/132681390/6244874.pdfIn PDF document text
    • https://jotonude.weebly.com/uploads/1/3/1/3/131398177/4266105.pdfIn PDF document text
    • https://tiseparalav.weebly.com/uploads/1/3/4/7/134735838/4447913.pdfIn PDF document text
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/9626613.pdfIn PDF document text
    • https://pegugaxuxidugif.weebly.com/uploads/1/3/1/1/131164321/10d153ccef8.pdfIn PDF document text
    • https://lorufolirosob.weebly.com/uploads/1/3/4/5/134584190/288598.pdfIn PDF document text
    • https://xijukuto.weebly.com/uploads/1/3/4/3/134354051/vufevo_gejabe.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/pixes.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/8137959.pdfIn PDF document text
    • https://tuwoganerolet.weebly.com/uploads/1/3/4/6/134631505/7936906.pdfIn PDF document text
    • https://vipapixamez.weebly.com/uploads/1/3/0/8/130814430/nagawusezudubus-gexusewavozi.pdfIn PDF document text
    • https://vatifogogunubit.weebly.com/uploads/1/3/4/7/134725392/netunamevob_pilevuzaxisu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/purawuma/joint_venture_development_agreement_format.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_off0001058b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058B 5156 bytes
SHA-256: 2daa4d9637852ba377f317f68b07e348118dd27b0d3f7e79eb95e2315ebfcb74
font_01_sfnt_off00011708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 10484 bytes
SHA-256: 8f2f8bf1a750004307db6c5c44d3b473f1fa060ae28f4a40deea693cc57d0046

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