Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac31c96feef4414…

MALICIOUS

PDF

69.6 KB Created: 2021-03-10 09:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3c61c2ebca1bef90063a2d3b26673f3 SHA-1: ee2ca844276e3510775249778529b9db1dafb605 SHA-256: 2ac31c96feef4414ba6a233215550b9b748fc5c6016efdc590a3f7e3c7abbcd5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, many of which are part of a link farm designed to mimic search results, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains text related to movie songs, suggesting a lure to attract users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://botokaw.ru/123?utm_term=bhairava+dweepam+movie+songs+free++naa
    • https://cdn.sqhk.co/rumoligodo/ghRyssM/nasacort_nasal_spray_side_effects.pdf
    • https://zugowexilib.weebly.com/uploads/1/3/5/3/135349829/31cc39c6d0.pdf
    • https://cdn.sqhk.co/tamejenonisi/dp4haU6/zigopufakifibivi.pdf
    • https://static.s123-cdn-static.com/uploads/4499629/normal_5ff29d09eea9e.pdf
    • https://cdn.sqhk.co/tovisegag/jijGhjh/61449999355.pdf
    • https://mekapejodefab.weebly.com/uploads/1/3/4/7/134740006/xazozol.pdf
    • https://cdn.sqhk.co/fosulavale/bSjjhh2/9652822765.pdf
    • https://cdn-cms.f-static.net/uploads/4471682/normal_5fe69055f323e.pdf
    • https://cdn.sqhk.co/lutumodigi/cMdhgL7/how_do_you_make_a_homemade_wedding_cake.pdf
    • https://static.s123-cdn-static.com/uploads/4367919/normal_5feb3361032ab.pdf
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/doruwarupawan_xobagozulax_vifuwiru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bezutu/abacus_maths_year_5_answers.pdf
    • https://s3.amazonaws.com/tidigudetefumof/casio_tough_solar_ws220_manual.pdf
    • https://uploads.strikinglycdn.com/files/16b0a5a7-ab70-4437-8d1a-e4fdfc849854/57719760267.pdf
    • https://s3.amazonaws.com/zeworibuzoza/85877398152.pdf
    • https://uploads.strikinglycdn.com/files/18b6e694-ac8f-468b-b11b-298e4036452c/ktm_300_exc_2015_owners_manual.pdf
    • https://s3.amazonaws.com/rivazixexuguri/angamaly_diaries_movie_with_subtitles.pdf
    • https://s3.amazonaws.com/muwomapotumugi/regenolubezeduxefinadu.pdf
    • https://uploads.strikinglycdn.com/files/5e87b3b9-eb78-4883-afee-ac49d8b93e08/cissp_book_free_download.pdf
    • https://s3.amazonaws.com/difigomisosak/russian_possessive_pronouns.pdf
    • https://s3.amazonaws.com/pogolo/pawifezafokuwakufebolave.pdf
    • https://s3.amazonaws.com/tonisefoteka/wapewematovemalobek.pdf
    • https://s3.amazonaws.com/pusori/51410935615.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfe5.bin
d9f7ebb954ff30bda492f28cb8405b46b59f13e88041dc64cd388cab1c0d6b44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE5 5624 bytes
font_01_sfnt_off0000e2f7.bin
5faaa8d4988dd97ea711013ce3170bdc1ccd20844df4e7bae5bf41c3d7c492e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F7 10616 bytes

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