Malicious PDF — malware analysis report

Static analysis result for SHA-256 6440921be2054a06…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 04:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31fb18b4c75cdaefc2eec28ddcefc882 SHA-1: 86fcbdcac50a2d6fb4cfd92f174d428c18de08d1 SHA-256: 6440921be2054a0693484f86150cdbf589d480937ff9cc008d697e5024d4d494
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 0.9996

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://leonvi.ru/wix?keyword=theme+music+13+reasons+why PDF link annotation
    • http://hermidkovo.info/lujadavetixii60mi.pdfIn PDF document text
    • http://onlinetiser.website/chevy_stepside_truck_tool_box23a0y.pdfIn PDF document text
    • http://bred-enligne.com/dawebezufwki.pdfIn PDF document text
    • http://profibrend.ru/baloxaxu1qfme.pdfIn PDF document text
    • http://forpost-electrica.ru/download_slither_battle19s4c.pdfIn PDF document text
    • http://socialwave.me/4014790431wo61f.pdfIn PDF document text
    • http://edarudost.online/kupaduoizsf.pdfIn PDF document text
    • http://ebay-coupon.ru/nusudefuwibx3pxf.pdfIn PDF document text
    • http://sokolov.fun/zexitowozuxusitru85.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/figugipopar/is_the_monash_fodmap_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cceeb87-abbc-43b1-bd8f-fc21eecf4c1b/15051143813.pdfIn PDF document text
    • https://48936d5e-4b15-4059-a328-ddb12afcc15e.filesusr.com/ugd/173145_5bf8cfac3dcd41d8aad20002efc85aa6.pdf?index=trueIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_3a323843106e40ab88170f64f4b5cb08.pdf?index=trueIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_18b4fcf254194152b74c685c9f62e1da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/how_do_i_check_my_driving_licence_status.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8443f5a8-4e18-4121-a24f-4655111c5ec5/49594004362.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_bc4f6af0357f475aa93d3958029ee8ac.pdf?index=trueIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_0f5de89181a84408b3b6d4417df86a5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24fc2aac-d00d-4b39-9e47-8d8b4678d361/tumelaxupigovavapasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/359ea804-33e0-48fd-af78-315157e902c8/2015_evinrude_etec_25_hp_price.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_f9a7b29b3ba8406c9f3ff80dbc00088f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/anemone_flower_information.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 5368 bytes
SHA-256: 73fef7c5965b306241b94c7d0fb202c73343e134141e8631951f29a06eea52ad
font_01_sfnt_off000101ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EA 11008 bytes
SHA-256: 7a2aff9c0ba787548d764dda6275aa1fdf48787cdd622c8305d4c2076fbd8be5

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