Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1ac774ac3f5299…

MALICIOUS

PDF

65.9 KB Created: 2020-12-13 22:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6eee03e728ae5d01ff6975c816be9c2e SHA-1: 948d9688357b245f484f8eada92397421550b607 SHA-256: ab1ac774ac3f5299346f75e0b0c1cff1dd3eef885b0e1785ccb9b3e3e886bafe
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The heuristic 'SE_INVOICE_LURE' suggests a phishing pretext, and the document body, though heavily obfuscated, contains keywords related to immigration forms. The presence of numerous external PDF links also indicates a link farm, likely for SEO poisoning or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffmen.ru/aws?utm_term=canadian+immigration+form+imm+1000 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390382/normal_5f9ff50c1bcf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460045/normal_5fb93965b24b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f89c39008e0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_5fd2615006727.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/620b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8730322c7dd.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/fb591ff6-c65a-41c3-b9a5-02be1cb30343/interpreter_of_maladies_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f50617e7202640040b44/t/5fc51bbd18e72e5fdb7ab539/1606753214345/minecraft_xbox_one_anvil_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64748a1-7404-4e49-bbac-71d2e5de5635/torta_de_banana_cremosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ebebae2-7a74-4716-a238-f9ddcc960093/patriot_game_family_guy.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_off0000c5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CF 5116 bytes
SHA-256: f8c9a98246a3f173fff561574f4602dbc9eeb977b6163de536d4c333a1a3eb63
font_01_sfnt_off0000d727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD727 10456 bytes
SHA-256: e51f7c0b2acd46dfb07dec7c8f6b2ebd23f4cf8bfa94c80cfe47e400b76d1b41

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