Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9c0d364e237f7e…

MALICIOUS

PDF

80.2 KB Created: 2021-02-28 06:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04ad421ade71b2c46b00e23a26bb19b8 SHA-1: 863e93ed051b87bd57e7c12fb537ec99d8cc6a49 SHA-256: 1c9c0d364e237f7e57a8a797cf6270e49685839e0955b543c78cc6ef54ca5949
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded links suggests an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/wb?keyword=the%20secret%20garden%20coloring%20book%20pdf PDF link annotation
    • http://alternativeinfluencenetwork.net/arrambam_full_movie_with_english_subtitles5z8lu.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/pzj8qgj/jinodasagarovasujoket.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/jIQSheN/tv_control_setup_with_amazon_alexa_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/iigQNps/engine_3d_live_wallpaper.pdfIn PDF document text
    • http://chelobaka.space/vigelamolbtrr.pdfIn PDF document text
    • https://cdn.sqhk.co/wujodazera/sTdijWf/download_game_bike_jump_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455886/normal_5fdaad676b3d7.pdfIn PDF document text
    • https://kipopedetazezu.weebly.com/uploads/1/3/0/7/130775623/zunonumet_jirowelujag.pdfIn PDF document text
    • https://wexopusipomela.weebly.com/uploads/1/3/5/3/135313487/ad99b3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390366/normal_5ffb9534beace.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372086/normal_5feb4fc32bfde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460944/normal_5fee531329d4f.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/qKjj2gf/nuranaxobinuxisozupimuzod.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/cgieNgi/gafalaponeduru.pdfIn PDF document text
    • https://rosunitekuw.weebly.com/uploads/1/3/1/3/131384708/5221181.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/0KbXifx/pusenetozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412181/normal_5fdc32749983e.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/boduxatavepe/bhojpuri_video_song_free_album.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/13369084491.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/friends_trivia_questions_and_answers_multiple_choice.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/android_sdk_root_is_undefined_windows.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_off0000fb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 5572 bytes
SHA-256: d5168899f2d66e67dcc8e4067dbd0fa866330f31c8b6acc8c814ea5b53e921b5
font_01_sfnt_off00010e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E33 10976 bytes
SHA-256: c9082615452f758e1430cf59d09797a817a30e4dc99eabdc24c49640949a8245

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