Malicious PDF — malware analysis report

Static analysis result for SHA-256 3224621b2f38bb5a…

MALICIOUS

PDF

80.2 KB Created: 2021-02-15 17:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7917f9825dcf79d17114d00cc7114ce1 SHA-1: 73044a4d493dd16082c308c5129c03886d53ae49 SHA-256: 3224621b2f38bb5aa8c9a9762585a916384c952bd99b5b3cd97c699aa1e91f59
156 Risk Score

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://druttle.ru/wix?keyword=osrs+barbarian+assault+guide PDF link annotation
    • https://cdn.sqhk.co/lolajelor/heahehe/vr_games_like_space_pirate_trainer.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikuzi/bhchdch/29523714378.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/85d01e.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/Hjjihhd/tebarapesojosuxetofulev.pdfIn PDF document text
    • http://vatologox.iblogger.org/blackberry_9900_android_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/cwJcphh/xuxevelofupuvalotek.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/icAihig/fumigojifozozopozirazavi.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/fulosobezur/cpm_integrated_math_3_textbook_answers.pdfIn PDF document text
    • http://xotesevuves.epizy.com/11809358966.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/wikiwosasazebetalinezowus.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/bedroom_furniture_vocabulary_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/how_to_report_unfairness_in_the_workplace.pdfIn PDF document text
    • http://kaborox.rf.gd/podepixowega.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/english_cocker_spaniel_grooming_guide.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_off0000fe80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 5160 bytes
SHA-256: 2c81f4f18eb0af884f020478e57d30a3d4e21283a9c1db472d2505b94c8e7602
font_01_sfnt_off0001100f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100F 10472 bytes
SHA-256: f5fb92a5b6512a146b329dfbea17080b5489879176174eefc06fd853f3556543

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