Malicious PDF — malware analysis report

Static analysis result for SHA-256 061d630eee7d08e2…

MALICIOUS

PDF

79.4 KB Created: 2021-02-10 09:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ce7043201d3e3e5731879afcf445032b SHA-1: c666092aca430bf4e5441b6f930fa532cca36af6 SHA-256: 061d630eee7d08e2692d6552e2f08b65bcf358d315cb82274a785574816e9a0b
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 distribution mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=work+and+energy+practice+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/demexadol/GjbjeOY/paul_hardcastle_song_you_may_be_gone.pdfIn PDF document text
    • http://useplafond.xyz/kalista_aram_guiden4ymp.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/oQjejfZ/30001400118.pdfIn PDF document text
    • http://opticsystem.website/dikij8ldkb.pdfIn PDF document text
    • https://pegepujime.weebly.com/uploads/1/3/1/4/131453637/6779214.pdfIn PDF document text
    • http://sallles.ru/11505036026c4bs9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505159/normal_600025e51436c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_5ffcda0740da9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_5fdb6f52b1b92.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/illinois_statutory_warranty_deed_formdnvpl.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/dcfbb6509.pdfIn PDF document text
    • http://drawer.icu/tubofajeweecwwl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5fecc6741cfe3.pdfIn PDF document text
    • http://natur-green.fun/amplified_bible_applsapc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380379/normal_5fcf3bfbf2052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380079/normal_60052ddf7f4f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FD 5572 bytes
SHA-256: 25749c962ff7dabb9768975261ebad683f95c03c6d851f00e2219e8aa2b0518d
font_01_sfnt_off00010913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10913 11460 bytes
SHA-256: 7527bdd4fbad0e089b9ab2e64ca2343a07f3475bd247c5070bc1ff5e4b6de2ef

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