Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac4da144332cc23…

MALICIOUS

PDF

81.5 KB Created: 2021-05-24 23:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bacb0ab9ca55c7feff815666f94a0266 SHA-1: 296e9b1fa30f4e66b1b81ba60e8b15c25dc47442 SHA-256: 7ac4da144332cc2353eca6b2af2b7a4c91c44163c63c7f779fec793e4c19d926
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=1998+kenworth+t800+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6043e688d9c8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489402/normal_605891a8562fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454306/normal_600fb67e4eba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_606e6a6f22075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fc5a9cb61ff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416502/normal_6019a404e19f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_603b1330442a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449615/normal_5ffdd267aaef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_60334650eee03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_6033a32be274d.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/retobifulipo/arrl_license_manual_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/rosesaxemovep.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/52130952092.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/gta_online_hangar_business_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af6d6e6-9dab-4ff7-9688-a173a9983fda/wavuj.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/o_d_f_ka_full_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b7534a-8532-46c3-81fe-f5bad7a33be9/how_to_run_java_program_in_notepad_in_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/biochemistry_8th_edition_berg.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_off00010094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 5528 bytes
SHA-256: 6af3240a79d7117dfc35ca607489581ebbbdebf1b87a45eb67c1a783614e034b
font_01_sfnt_off00011346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11346 11080 bytes
SHA-256: 52dcb892aa5eedabc98c7de3b0129f4a4475488576b6a75084c6f9254de3009c

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