Malicious PDF — malware analysis report

Static analysis result for SHA-256 5146c226daf1bd34…

MALICIOUS

PDF

66.3 KB Created: 2020-11-23 11:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7ba65e218f5a6dcac1e860971df36283 SHA-1: d5e6618173ee78559ae7bf6166066e63b8ab0079 SHA-256: 5146c226daf1bd349e8767e24c933b8f590290d3a0532e4521a88ce21b376448
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=nikon+mc-36a+manual PDF link annotation
    • https://jerezuwiwufuken.weebly.com/uploads/1/3/4/3/134355676/ac0a09781f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5fa853ea46688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fa72ca3269e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f873901b252b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_5fb64094bfca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5fbb2828aa933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_5fa89eb116eb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453732/normal_5fa5e6127f7bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412757/normal_5fa0c08d4ca01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_5fa5be90e338c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5f889fcfd4e51.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/98454e10-25af-4c65-a8d2-b3407a1175bb/download_pubg_mobile_apk_latest_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a4bdad2-65c5-45b1-be28-d9d907a90ff3/civics_eoc_review_packet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2112dd9-82f7-4182-80eb-a56011626cb4/diwodenanavox.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFC 5056 bytes
SHA-256: 57408757518411baf9e69033ff87b1e2f4bcddf8442f7c87fd8c0fff3ca78105
font_01_sfnt_off0000cd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2B 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000d88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88E 10544 bytes
SHA-256: d891df6652bd567241a2451ade667ee8e0dbd83315445a76ad369a31d29d6ed7

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