Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6162b31ef70b967…

MALICIOUS

PDF

75.2 KB Created: 2021-02-09 02:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6283895f23542683592c5b6c924cc1ee SHA-1: 06498f8d7180fc4c1e11e6d48b8b3efe7007867d SHA-256: a6162b31ef70b967b3000124100c5810f3b1f318dbf84b8c5a0ab1d7ce8bfc20
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs pointing to external sites, with several identified as part of a link farm on disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing pages.

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://druttle.ru/wb?keyword=wowhead%20destruction%20warlock%20guide PDF link annotation
    • http://small-italy.space/blaue_reiter_almanacuvai2.pdfIn PDF document text
    • http://lupokixez.22web.org/fufovo.pdfIn PDF document text
    • http://tovelksa.website/rugby_ball_on_rope_game1g77n.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/ih4gghb/woodworker_s_journal_dvd.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/cyE6jhI/79433859243.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452400/normal_5ff3e605356bb.pdfIn PDF document text
    • http://tesiwonogi.iblogger.org/moliterorobavuzanog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494661/normal_5ffd1d53f1875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369933/normal_6007b98bc1ea4.pdfIn PDF document text
    • http://stav-games.ru/video_er_for_instagram_repost_app_uptodownqwcfo.pdfIn PDF document text
    • http://degujub.iblogger.org/pugubedefageda.pdfIn PDF document text
    • http://nogivubuleduwi.22web.org/mayday_thefatrat_sheet_music.pdfIn PDF document text
    • http://worldhold.online/lidobosexez8znt6.pdfIn PDF document text
    • http://pijakonojimuw.iblogger.org/adventure_games_apk_offline_free.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/jixeremipet/asurion_work_from_home_interview_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/zong_free_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/naruto_sennin_mode_char_mugen.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_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 5372 bytes
SHA-256: 0bc82b7538a67344746f87d0862fcf3a2387a28133f517253c37068a3612b9ba
font_01_sfnt_off0000fa90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA90 10884 bytes
SHA-256: 5e415517c7e734eb1a443aa62b257131804621a98ac23d281b25b545c6252c6a

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