Malicious PDF — malware analysis report

Static analysis result for SHA-256 59787cc8b277474f…

MALICIOUS

PDF

66.7 KB Created: 2020-11-17 18:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f0f5aa96c5b86baca7cc93f9359f29a3 SHA-1: 2ea4363200ce041eebb52bccd43c38e248977091 SHA-256: 59787cc8b277474fc041ddd22eed38729a357333c81a75506fb4f566c583100a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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.
  • 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://traffset.ru/123?utm_term=sulfuric+acid+charge PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388596/normal_5faab60dea701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_5f9610c05e1d3.pdfIn PDF document text
    • https://kutolimog.weebly.com/uploads/1/3/4/4/134435461/vazadomeju.pdfIn PDF document text
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/9559531.pdfIn PDF document text
    • https://nogegonimever.weebly.com/uploads/1/3/4/3/134340032/witodatojukipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fa96afd97fda.pdfIn PDF document text
    • https://jezafemobad.weebly.com/uploads/1/3/1/3/131383748/dodirigemenefebal.pdfIn PDF document text
    • https://lisoletabe.weebly.com/uploads/1/3/4/5/134511207/f4763c65d6c0fa4.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/521aeb56-f5bc-4a9a-87ab-5f4fde11753e/fogedokadej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9264317-fead-4aa7-b073-2e8290305e6b/jedi_boots_men.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a863cb9-90e4-4c2a-a7f4-81533bedf257/oh_crap_potty_training_nz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33f6602-6df4-4e56-8d3d-4a24a82466d2/kusezet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c57a713-33d4-45aa-b89e-6ff250af7326/91500985348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8868cc19-2e15-47b1-a204-d2ee992a220c/spectral_graph_theory.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_off0000c8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D7 5208 bytes
SHA-256: 73910370486a7b231af00bf6229b5f616b0c58239865194f0fdf9107192617af
font_01_sfnt_off0000da8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8A 10376 bytes
SHA-256: d3702f0214072a69cf0020ede887d896e740eb213f1243fa5547af39511c0331

Open this report in the interactive analyzer, or submit your own file for analysis.