Malicious PDF — malware analysis report

Static analysis result for SHA-256 736ad6acb10717a1…

MALICIOUS

PDF

68.4 KB Created: 2020-11-17 05:57:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e5f197b843a6a6b90fff847f431ceb11 SHA-1: 92fad508421b4806d6ad9d50de90d9716d42609b SHA-256: 736ad6acb10717a155cf9795caf7c8e1df1711642202bae51ee7b4b7404c5e46
156 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 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://trafffe.ru/123?utm_term=sierra+national+forest+camping PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5fa62090bb949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404738/normal_5f9c5249791c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f92787abdd39.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/rosan_vepobojitopagip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f8a8eab90a97.pdfIn PDF document text
    • https://jonoxuxiwef.weebly.com/uploads/1/3/4/3/134314506/dadedenetomusin-zabus-taxutugiweledor-seratifijej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f8775c591f55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5fb328c26194d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f9fc1681e6ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5f9bba7d9ca81.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/1b4f32fd-b497-43b6-908b-a3efa5f1d693/14187260088.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/bubabejikapig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284e0382-1607-4b92-817c-f5873f5a6c0a/microsoft_technical_fellow_pay.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 5

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_off0000ceb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB0 5436 bytes
SHA-256: 0f40ce368ffdba23c38d2c2a818cf854b4c91c06954107ba2f28720e8bec8fdf
font_01_sfnt_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 10704 bytes
SHA-256: 48e7f0b01f542598c6f8868e3c6af73dbeaf52357dc5a6f0617f3828a2459fb2

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