Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a25c74c8ecfdf2…

MALICIOUS

PDF

74.2 KB Created: 2021-05-14 01:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 67c73d33b7ef00f0078dbae3e941025c SHA-1: df40713bab546a516069cc97430911b1e7253cb7 SHA-256: 09a25c74c8ecfdf2ec332e47af8dd971471fa21ecc6f95d813297a057c0be859
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/strik?utm_term=how+to+update+lg+tv+os PDF link annotation
    • https://cdn.sqhk.co/sifajoxojif/bacLiaC/angular_5_sample_template.pdfIn PDF document text
    • https://cdn.sqhk.co/fenozidu/GjaLab2/34301055600.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/hjja5K5/rotator_cuff_exercises_for_elderly.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/gichbPN/shelter_cove_california_real_estate.pdfIn PDF document text
    • https://cdn.sqhk.co/nijegonusas/RLJOjc2/azar_hack_apk.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/sitozi/vawuvefotonagibimowokadon.pdfIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_addfc5c9a40549cc8a3728ef6b47f11f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa24cedd-c09b-45e8-8a43-fd934690aef8/triangle_congruence_proofs_worksheet_answer_key.pdfIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_0e076e5610854369a800a07b4e5799fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/world_longitude_and_latitude_map_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/finding_limits_algebraically.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b85db3-f3c8-44ae-9095-fa7d554b9cd6/pearl_of_great_price_1851_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d299be26-91c6-47ec-a045-57a2174deba1/altec_lansing_life_jacket_not_connecting.pdfIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_415076208814494a8ef7363fb514ab4d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/419d776c-c000-4c36-9f23-eb10a31881ab/tiweno.pdfIn PDF document text
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_2c95a82cd1604ebabe78db4b6463f194.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b5e179-2c02-4d48-a61c-c97f885c6775/46704922191.pdfIn PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_a529bb7d2e2c495b8d82bcc927e8cdc8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/cause_and_effect_text_structure_keywords.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_off0000e4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 5144 bytes
SHA-256: e4c5626b175c7729e34ac664d28e10dda50783a13e827ed76589d4a3e8b4ddca
font_01_sfnt_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 11004 bytes
SHA-256: 7f84b503583b60a7118f6a2018ebbee15a695e8dea98bf7d836cab1e6536b841

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