Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae66fa07fcd36317…

MALICIOUS

PDF

78.6 KB Created: 2021-05-17 19:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7432c4d38886f15dcb69064fb6c94e6b SHA-1: 21ed75133c62e47be7955741d92c29784b4612ca SHA-256: ae66fa07fcd363171c035eb5351bb0b785ae69fa0df27a073c3e9622d6d2fe1c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to distribute or phish via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/strik?utm_term=book+of+thoth+etteilla+tarot PDF link annotation
    • http://lnstagramverifiedbadgeshelpcenters.net/ableton_free_for_maczfjif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446395/normal_5ff428f53e556.pdfIn PDF document text
    • https://cdn.sqhk.co/goropakuvoge/ihtl1PS/ac_market_latest_version_app.pdfIn PDF document text
    • https://tiwedipetubed.weebly.com/uploads/1/3/2/8/132816066/02a842.pdfIn PDF document text
    • https://cdn.sqhk.co/gasawivu/VHifrii/89600478178.pdfIn PDF document text
    • http://carluxepaint.site/main_branches_of_biologycye8z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462339/normal_5ffc4e0055594.pdfIn PDF document text
    • http://itravelgr.com/tewagononou3ypq.pdfIn PDF document text
    • http://antonioita.fun/sirumamejebb38u.pdfIn PDF document text
    • https://xamudoniganotew.weebly.com/uploads/1/3/4/5/134509964/5378908.pdfIn PDF document text
    • http://lifeshop.pro/889554497874lcry.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/eBgfhgE/adding_three_fractions_with_like_denominators_worksheet.pdfIn PDF document text
    • http://repair-telefonov.ru/travertine_pavers_installation_guide0d29x.pdfIn PDF document text
    • http://nonretloli.site/soccer_world_cup_final_2020_pakistan3ctun.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/iaibidh/fasuradigedeg.pdfIn PDF document text
    • http://lofitner.buzz/tolebuhh0u6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_606a28d172de0.pdfIn PDF document text
    • https://cdn.sqhk.co/nokowifupe/iiBjagf/rogoxesudalevo.pdfIn PDF document text
    • https://defugelunek.weebly.com/uploads/1/3/4/5/134524545/koxonusexatug_voritaxo_sasipogaw.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/3903496.pdfIn PDF document text
    • http://podeves.xyz/nemesis_board_game_instructionsf7bax.pdfIn PDF document text
    • http://world-wildshop.com/zixozup46uxk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_83bb167923234c26887409231cdd1613.pdf?index=trueIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_5dde4e5eeacb45da9852cd9813f654d6.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_0958c391d8174d0f98fb735b2dc1f701.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_off0000ece5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE5 4792 bytes
SHA-256: 4c3b79e141300ba71ad68c692e787ccdda481c0ed9743b0427b16daa85c0d789
font_01_sfnt_off0000fd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2B 18992 bytes
SHA-256: 31f94ca1635e7265189d2f40d8af3bf1a96af6208e4a34dabd50554112754297

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