Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c1227fb28a9d27…

MALICIOUS

PDF

67.0 KB Created: 2020-11-16 16:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: db161c5c55ab211943957535bde50f58 SHA-1: 16fccfb17f953d6a9fa522ab1dedd608761133c8 SHA-256: a2c1227fb28a9d2799ed552d3251165b18994a009351781be393f5362ad7d95e
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://traffnew.ru/strik?utm_term=element+3d+primitives+pack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375341/normal_5faa34a82fefd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5f8d95bc9cc4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_5fa94b4b0623d.pdfIn PDF document text
    • https://guzaxogovi.weebly.com/uploads/1/3/4/6/134651677/f2a721b6f258.pdfIn PDF document text
    • https://zuvubexusemeto.weebly.com/uploads/1/3/4/3/134373725/841395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5f8cbdc1b2a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f911ea950fde.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/jamokaroxoj/70674212066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f23631a-10e9-4445-9661-8d0a5ea79892/zofawepasipumi.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/ravafudumusumepi.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/old_trafford_cricket_ground_manchester_pitch_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/formation_sap_bruxelles_gratuite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3052cc-7ac7-478d-99ad-6f14505315af/mudap.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/geloxu.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_off0000c5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CB 5464 bytes
SHA-256: 2eb82e4f847795b36f73592b0081bb64e903a42554d7bf66b2e57775fbdd2682
font_01_sfnt_off0000d851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD851 11032 bytes
SHA-256: bd254dd865fc962b76d0931225576e04f5bd97cbaef95f45b604f36054757bfc

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