Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e60e94144d59476…

MALICIOUS

PDF

97.6 KB Created: 2020-11-13 01:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8e98dae11ab0e365a3d71b2f468ede2d SHA-1: 265ed81bfe614dd9c002d3a433ef474bba975ffa SHA-256: 7e60e94144d59476d169fe000444453a6d1f4b3fe64bd054b6ac0860d4217f20
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 0.9995

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://trafficel.ru/strik?utm_term=abituriyent+4+2019+pdf PDF link annotation
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/359a9053c490c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374840/normal_5f9b7148a1a37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5f9cd1a05293e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471686/normal_5fad9c4449cb9.pdfIn PDF document text
    • https://sonedolab.weebly.com/uploads/1/3/4/6/134630530/c6c1c2a74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6854e0b9-f55e-4af5-a03b-c2814d8d6615/medesagusakigajevoluruv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368aaf25-d70f-43b5-b4d6-ce0d21d8174a/statistics_for_business_and_economics_10th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0459631f-e3e9-4a71-8141-a548520bf5ae/31577158353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7ce744-3d07-449e-a8cc-009bb8a85aac/71573398581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b71f84-905b-4d82-8d7c-96d6255e10ea/78448865215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7abd4d-ab29-42ab-a027-046c048bf7f9/kuwawaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11329c0c-efcc-48a9-ad0f-ec601f9c63a4/allez_viens_online_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f0a62a-fc5e-4f24-9810-a868ef1776ea/jevaxewupemibuzefiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259f7ab4-f7cc-44ce-a584-d994c30b0937/poratijibuki.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA8 5188 bytes
SHA-256: 5a8dde0204f24b4092d0110bcf74e3f45d0ea11f83dbc5590ed79d12f3597254
font_01_sfnt_off00012c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C65 13336 bytes
SHA-256: 14abcbf0519afb912825ca3c84d7737ec668f6da6b51f150a933d0b6ae254f19
font_02_sfnt_off000154cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154CB 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off000169f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169F8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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