Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f73104d741d10ff…

MALICIOUS

PDF

73.8 KB Created: 2021-05-09 11:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4f5dce21262ff8298d451c2925b9d422 SHA-1: 14bea388e5dc02293dc5fefd97e5d9714c87270a SHA-256: 6f73104d741d10ffd809994bd04b10e06080513675abf379e623cc87dc1ccaf4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'https://maypoin.ru/strik?utm_term=lee+reloading+manual+pdf+free', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'reloading manual pdf free'. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=lee+reloading+manual+pdf+free PDF link annotation
    • http://gunonoxuketevel.22web.org/ribapidulejagodizabososuj.pdfIn PDF document text
    • https://cdn.sqhk.co/zapoboveje/xED7mjc/fivikapiromito.pdfIn PDF document text
    • https://cdn.sqhk.co/bulamije/zDiQiiD/kpop_groups_debuting_in_october_2020.pdfIn PDF document text
    • http://bogipeborowe.sportsontheweb.net/73609158495.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vapojolojumow.rf.gd/anarchists_cookbook_fallout_4.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/the_witcher_season_of_storms_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/84844150435.pdfIn PDF document text
    • http://dufiketuwu.epizy.com/textbook_of_medical_physiology_12th_edition.pdfIn PDF document text
    • http://binalidagu.epizy.com/43923558104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/087625bb-9251-4f12-bbd3-65a2680d91c4/cyberpunk_2020_sourcebooks.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/57972880662.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/treatment_of_anxiety_and_depression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f6008d-3afb-4854-a4bc-4f1843214fd6/91444881032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b731629-28ab-4f3e-89e9-d07bc98979e4/jidewopeno.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/20899044153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a248156-ebdf-4e90-9cd2-91ff0ea13f18/61989589974.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/wind_in_the_willows_musical_cast_list.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/43629301248.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/36791860377.pdfIn PDF document text
    • http://dojafeduzig.myartsonline.com/61884935711.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 5124 bytes
SHA-256: ef67b12f7ea45b0b6e3b15b27da8440a929250c90d347c70e4b520daf72de951
font_01_sfnt_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 2044 bytes
SHA-256: 91a2483cff7d46cd2695afdcb5499f75165020984844fb5d5e4ea1aacbfa0e66
font_02_sfnt_off0000f44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 10596 bytes
SHA-256: a877f8e0edc4d4a87f3fb977af18b84facdc7d2cda3d20d2d236d5ec0eed26d1

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