Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c3147bf41837b4…

MALICIOUS

PDF

65.1 KB Created: 2020-11-28 14:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7b15eb8178ab76153c1793a7654506c3 SHA-1: bd3b059328f13b5bf03e6b9349703383b95882e8 SHA-256: 02c3147bf41837b47a7d665d1ae36e3eb7c30e1a927b2d8a7e965bed8ae81798
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Dead target apk mod', indicating a likely phishing or malware distribution attempt. The presence of multiple PDF links and a critical heuristic firing for a malicious redirector strongly suggests this file is part of a campaign to drive traffic to malicious infrastructure.

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
  • 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://traffmen.ru/strik?utm_term=dead+target+apk+mod In PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_5fc14c7cc430a.pdfIn PDF document text
    • https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/wadovi-manidewowije-xulanovilexaroz-tebenimev.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/9324891.pdfIn PDF document text
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/zugomi.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/f24504c4-4dfe-4c5a-a2e8-3deb51d67141/zexofufij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d93389-f224-4c08-a947-8fe7313f1997/7149695020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d532df-1340-4a9e-9664-740cdc6f1d81/27539239438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f0057e-d513-4131-bd85-cb14ad2eeb41/exersaucer_door_jumper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b950a5b-7f51-41f6-90db-9707a8cfdfa7/zixopili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8009fd4c-ae2f-4e7c-befd-2bc008f98963/mavugulinate.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC326 5132 bytes
SHA-256: 9b820c0044542bda7510c2aaf6e4ba84fc5086e4aaec4fa903666098fbaa5bcd
font_01_sfnt_off0000d492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD492 10444 bytes
SHA-256: 54e3853780462c79f1eabfdfd6af966985dac3667e6718517510a1bce31af351

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