Malicious PDF — malware analysis report

Static analysis result for SHA-256 3601898d90f43fd3…

MALICIOUS

PDF

75.9 KB Created: 2020-12-16 18:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e855e23e51338db36f12d24e3f72b27b SHA-1: 95e59d65e078b987555fa3613e6a4247ff628478 SHA-256: 3601898d90f43fd395ef34dd6f778bfe82d208613749c8b1ad7aee56ee456650
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 0.9997

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=lg+front+loader+washing+machine+error+code+oe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f8c55dba4e4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480732/normal_5fbb5e8f73d4b.pdfIn PDF document text
    • https://gigufeti.weebly.com/uploads/1/3/4/6/134633464/608c4f0fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5fb8214f672be.pdfIn PDF document text
    • https://toguvanamevodo.weebly.com/uploads/1/3/4/6/134615804/8879690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_5fa19173cc922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5fadbce7ca400.pdfIn PDF document text
    • https://pixasowurixes.weebly.com/uploads/1/3/4/9/134904492/8693728.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/9ea53165-16eb-4864-825f-25c488c0d0c6/31948520338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6cd375-a74a-466c-8371-87935e697172/magic_duels_deck_build.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1732905e-3770-41d1-b53c-28d3fae4f6d1/7lbs_in_7_days_the_juice_master_diet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc316c9a5bc066edfb3e2e2/t/5fc4f61abc819f1cf4744aaf/1606743579280/wejexepifilaworafotoju.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc67ab56b97992eb581d6b2/t/5fca8c73df388c3a04bd307d/1607109747649/vuwapemiwogedusigelo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66A 5468 bytes
SHA-256: a2e36094c24ae2e6571700f5c0ea87a2c29d9c7eee4a2308924094d18de08de5
font_01_sfnt_off0000e8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F2 10480 bytes
SHA-256: 0c3a52ce749b08646f0b90df372c31663d416edc96d628c472b3c98a2f001c31
font_02_sfnt_off00010cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCA 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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