Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0b8ab1f7f12ca2…

MALICIOUS

PDF

78.0 KB Created: 2021-03-24 23:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 20d500fe14a54709d20b0f729e7f0bb1 SHA-1: d11260cd96b41faeb8426814853fd82f8833f8fb SHA-256: 7a0b8ab1f7f12ca21262d645b53f9c016e0cb1f6a4bec4584d854b30bd2fbf37
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many of which are disposable, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure for downloading movie content, which is a common social engineering tactic. The presence of embedded URLs and the overall structure strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=twilight+full+movie+in+hindi+free+download+hd+all+parts PDF link annotation
    • http://jaralet.getenjoyment.net/antithrombotic_and_thrombolytic_therapy_8th_ed_accp_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/hjhgOic/52968592645.pdfIn PDF document text
    • http://fazurusitu.getenjoyment.net/suzepe.pdfIn PDF document text
    • http://fadulifakibul.medianewsonline.com/badaguja.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/arris_tm1602_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/melobokodijo/jhggwba/thrift_stores_long_island_nassau.pdfIn PDF document text
    • https://cdn.sqhk.co/riragimi/bohivgi/e_trade_day_trading.pdfIn PDF document text
    • http://posurazatux.mypressonline.com/png_public_finance_management_act.pdfIn PDF document text
    • http://boxijogirexu.medianewsonline.com/cardiovascular_system_anatomy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/15451ec0-b403-4610-bb01-53ff931f227d/strangers_on_a_train_remake_2017_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb205bcc-223a-4ae6-9e76-6f13a0a9db30/kotuf.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_eb4e9d653819408b8b6ad11639c1a285.pdf?index=trueIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_d8a19295221b49d5a88f7f5e41855807.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdaa2e72-6b24-4cb9-9017-3cea642559d9/how_do_you_use_detox_organic_apple_cider_vinegar.pdfIn PDF document text
    • http://mugazukadum.onlinewebshop.net/runodekokuzarumipowexonej.pdfIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_3f41d2c0ab054cd4a19ef6f4de707b1c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d615be58-45b6-471e-af48-daebefdf7552/34187797630.pdfIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_d302275ee0e241dea80f985af44eab95.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/687787a8-93f5-4254-959c-20807d5c86dd/3538194415.pdfIn PDF document text
    • https://ea29520f-fefa-4c12-ab21-0e0839e82572.filesusr.com/ugd/5d2047_d5f423e7796c4ac6a4c5b864168bab6d.pdf?index=trueIn 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_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 5556 bytes
SHA-256: f468668c10cc6168a31f43bf9cd5e777c0ae72f4f1c68956bf5846d4c505f154
font_01_sfnt_off000105d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D4 10652 bytes
SHA-256: ba77c9af6e596959e4d2c8a7ffd55948c240a396c22ccec88317c5b410f66646

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