Malicious PDF — malware analysis report

Static analysis result for SHA-256 70525f1462bba69f…

MALICIOUS

PDF

81.7 KB Created: 2020-12-27 16:18:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 72941c4c7a933056486f27f5b0fd798e SHA-1: 020fbac2b3cdd44dc4203c4f4b5f6319ca315556 SHA-256: 70525f1462bba69f40a7677cce4114084446c39684f3059fe41d45966207cd2a
156 Risk Score

Malware Insights

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

The PDF contains a large 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 malicious intent. While no scripts were explicitly extracted, the nature of the PDF and its embedded links point towards malicious activity, likely related to directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=smoke+brushes+for+photoshop PDF link annotation
    • https://simavaxefawok.weebly.com/uploads/1/3/4/6/134666246/temudosipi-kasin.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/7209647.pdfIn PDF document text
    • https://nonoxatuvel.weebly.com/uploads/1/3/2/6/132681685/vifedopow-xovodataxujuxet-jinolatunesaxiz.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/2FRjhjj/sling_kong_hack_ios.pdfIn PDF document text
    • https://xuvarilanagore.weebly.com/uploads/1/3/4/4/134470983/linosed.pdfIn PDF document text
    • https://lulapusorifat.weebly.com/uploads/1/3/1/4/131436971/1193431.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/rusafujemewi.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/9279726.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/7494562.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/mejigavukolu/38546714149.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/rifonamivevisanokojolonu.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/jevitiruwukuvatapajunon.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/15494921500.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 5208 bytes
SHA-256: f9c23ef5d7c9eb3f873ddbdf0ffda3fc75947db6823d72be719cccedd1b7175f
font_01_sfnt_off000114a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A1 10960 bytes
SHA-256: 1fe02d38a2db12a16e4fbe8703d6a4065805cf69c4bf2870d71736f48ca417b2

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