Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a58fd19d8b00f1…

MALICIOUS

PDF

68.4 KB Created: 2020-12-09 03:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c9c8e52cd8fb0a1746981a178344d9c0 SHA-1: de0e9b2fb4aa0b27fd84102df17aad7a3ab76263 SHA-256: 50a58fd19d8b00f1d1d7f4c2eb6d0756d7861f27f3060a692a7bb788cccc5e57
214 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 and routes users through malicious redirector infrastructure. 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
  • 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.
  • 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://cctraff.ru/strik?utm_term=the+paris+architect+audiobook In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.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/354f2c4b-bec1-42ab-92aa-d35a80eb6499/97246571907.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/79128018412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6c40a6-ccb2-49aa-a13b-c1a6d1d76ea8/57225665135.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc535882e34347c706079c8/t/5fc79ff24f9413233b276dc1/1606918133231/17947983092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7de035c-c665-4628-b37b-077e57c5c2b4/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980e8fd9-5097-42f7-9542-8b472a00598d/coleman_pop_up_trailer_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52900bc-66d4-4c80-b390-e1d8adc58882/bowelosu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc141b28ef7301f8b131a8a/t/5fc83ac2b74dd54858d10641/1606957762576/real_steel_game_ps3_gamestop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1088bba-18f6-42f5-be54-c4ee7ac589f0/tomulovabutowuduriseguri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fea2eb1-3516-4808-adcc-fbce9c4805f9/purusha_suktam_sanskrit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3a8ba1-9631-42ce-824e-1f0264a42e0a/52424109037.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_off0000cac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC1 5280 bytes
SHA-256: cb7e7bb6b8a578fb3e72caf14b04affafbd55dc31cbb74c59eabfc164df608fd
font_01_sfnt_off0000dca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA0 12804 bytes
SHA-256: 432e19f8d11702fa2fbe534865aeef75f85fd2279974d2361ee07c45d04d41bb

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