Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1fcd8d983962b8…

MALICIOUS

PDF

76.1 KB Created: 2021-04-02 22:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bd8ea9f5f9ecd86e447b416c97ab9640 SHA-1: 9a296c6f1682eea73b54331564ace66a620e71f4 SHA-256: 0b1fcd8d983962b828f878a9bbb104c22806c1dee0692b8d8b90b120811952c1
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=11th+science+biology+book+in+gujarati+pdf+2020+ncert PDF link annotation
    • https://jevixivuxed.weebly.com/uploads/1/3/4/6/134622771/vabuxijose.pdfIn PDF document text
    • http://3203epworthcres.com/kenmore_mini_fridge_not_coolinga0zn4.pdfIn PDF document text
    • http://yourcy.com/sotudutuwijejamo3qn94.pdfIn PDF document text
    • http://suwefazimim.medianewsonline.com/78020554981.pdfIn PDF document text
    • http://moxawunanenubop.sportsontheweb.net/fazurimozebekatez.pdfIn PDF document text
    • https://povilaromegew.weebly.com/uploads/1/3/4/4/134486615/0489e81fbc11d.pdfIn PDF document text
    • http://micrometerdigital.xyz/tuxufaxivobalimijerazadig3o9je.pdfIn PDF document text
    • https://sifirugosiwoxam.weebly.com/uploads/1/3/1/3/131384024/119159.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/how_to_write_a_story_with_introduction_body_and_conclusionrtsw2.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/tosaligefuk16nf9.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/claudio_monteverdi_cantate_domino.pdfIn PDF document text
    • http://fortuneo.biz/fur_elise_sheet_music_freemdc6g.pdfIn PDF document text
    • https://zevigutuxokalu.weebly.com/uploads/1/3/4/7/134769804/06279abd46337.pdfIn PDF document text
    • https://rokotejipap.weebly.com/uploads/1/3/0/8/130814190/gowivasowumev_nowagejomi.pdfIn PDF document text
    • https://gabinomila.weebly.com/uploads/1/3/4/7/134763369/10fb76fb666.pdfIn PDF document text
    • http://ericksandoval.com/56142873966c49hy.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/tojabixefova/40738323746.pdfIn PDF document text
    • http://misanedajog.myartsonline.com/validity_test_in_research.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/77739838090.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/public_speaking_anxiety_scholarly_articles.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 8

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_off0000ea23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 6032 bytes
SHA-256: 0f1898ad35c1f5446a44e4705690f5a2d80b7f70999f0c23f3464b19d5a888d3
font_01_sfnt_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 10560 bytes
SHA-256: 6e5501598cf24efcdf5a7c18e893af4acba9b6f570fa94fbaf1eac110c890df0

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