Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4df12dc28d7403…

MALICIOUS

PDF

89.0 KB Created: 2021-03-14 18:24:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: f4648e2b598d448bfc6f55ec6b76e348 SHA-1: e11782d342364a2ef6b749483c67ae7893475746 SHA-256: de4df12dc28d74035a923b5dbc5bb93ebc9bfcec9c54612d3630fe61011c4a7b
66 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of links to disposable hosting, suggesting a link farm designed to obscure malicious destinations. The document body, though partially garbled, mentions 'Environment variables in cloudformation', which appears to be a lure to attract users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • 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/123?utm_term=environment+variables+in+cloudformation PDF link annotation
    • http://onlyforyou.space/totujobotowotoiauwl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479435/normal_600af93226a7e.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/ie9ZihG/wifi_analyzer_tool_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5fc98dcd65500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376120/normal_6005f37edfc3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_602b019f8193c.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/ct0NgZc/jibami.pdfIn PDF document text
    • http://health-top.ru/getozerazafuxafigt3k0y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452395/normal_5fc7ed6e72fdf.pdfIn PDF document text
    • http://thechambre.xyz/705122721070kt79.pdfIn PDF document text
    • http://olivamebel.com/what_direction_was_the_sun_when_it_rose_this_morningg1y4o.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/jghqXhg/best_homemade_face_masks_for_oily_skin.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/bpBTksd/fox_mountain_bike_gloves_orange.pdfIn PDF document text
    • http://hdvideo.design/is_defending_jacob_getting_a_season_2wwsaj.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/n9DhhiC/xunenoxesaxiretame.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_604cf04fb3bdc.pdfIn PDF document text
    • http://joy-todays.online/stephanie_coontz_marriage_a_history20b0o.pdfIn PDF document text
    • http://acgmgroup.ru/does_collagen_help_tone_skinss3r2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_604b019c61c70.pdfIn PDF document text
    • http://lightstart.xyz/xikuvofudedemirukolzjmqd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_60073499a5ae3.pdfIn PDF document text
    • http://net-klientov.ru/8203946016603fh5.pdfIn PDF document text
    • http://afracheat6.xyz/93781847377jjcwq.pdfIn PDF document text
    • http://sport-stavki.fun/cyberpunk_2077_ps4_updatere0a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D62 5204 bytes
SHA-256: aeb10794e19f6bf9d904a7734a1e0b083e43f8e2b05aa79e90d62de253dbbdf4
font_01_sfnt_off00011ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF2 11608 bytes
SHA-256: 8c13cc4078a8f5f46beda354eb872c4a63bcc962da3d353d664843732c3d8db3
font_02_sfnt_off00014667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14667 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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