Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9c41ac970b68bd…

MALICIOUS

PDF

89.9 KB Created: 2021-02-22 04:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7ec2116d092b7f82836d59ca3b4d565b SHA-1: da2e6f915d6ae687c11d207b0b72cb55275d9058 SHA-256: 8a9c41ac970b68bd95a62e35fdec4e20ae2d8a66903ecd682ee3ed50c8b43047
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting it is part of a link farm designed to manipulate search engine rankings or redirect users to malicious content. The document body, though partially corrupted, contains keywords related to aerial photography, likely used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=que+es+una+fotografia+aerea+y+para+que+sirve PDF link annotation
    • https://nazigexasuv.weebly.com/uploads/1/3/6/0/136081917/wekesimivuwepojojo.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/ihiBMji/53883502847.pdfIn PDF document text
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/letojoxu_gebujademorozex.pdfIn PDF document text
    • https://mevinabepoke.weebly.com/uploads/1/3/2/7/132740553/xipumamemuto.pdfIn PDF document text
    • https://simejozegedofu.weebly.com/uploads/1/3/4/3/134359486/medajoxifugiz.pdfIn PDF document text
    • https://zakewurez.weebly.com/uploads/1/3/4/4/134471700/bopajovubujasemaxix.pdfIn PDF document text
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/6669858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484114/normal_5fcc0009e4a84.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/b3b94cbd61892b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/fotiwofotigaxebut.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/samsung_blu_ray_player_firmware_update.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/semi_formal_email_ending.pdfIn PDF document text
    • http://boludit.rf.gd/lagu_chronosaurus_skz.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/25011667232.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_off00011ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC2 5384 bytes
SHA-256: adcdfdce640edbd34ee653a0801ef065ccfb3000dcb335cf5a8d350f3a20525a
font_01_sfnt_off00013136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13136 12228 bytes
SHA-256: edda0c98016736babe329cbb6d56263d868c937b883ea6f3b30a18aabf93d640

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