Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e7bf4a272ac8ef…

MALICIOUS

PDF

82.4 KB Created: 2021-04-07 21:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5d1a59efccae7ec0bc24beb44207eb0 SHA-1: 6a0718d6b7d980a546fd2ac839529a411f5a3d1b SHA-256: 89e7bf4a272ac8ef12f3d179d015bf0b12874d4e0243bef8a31d03875d61dd2b
126 Risk Score

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 pointing to external domains, many of which are hosted on disposable or link-farm-like infrastructure. The primary URL, 'https://druttle.ru/wix?keyword=black+and+decker+powershot+staple+gun+manual', suggests a lure related to product manuals, likely to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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/wix?keyword=black+and+decker+powershot+staple+gun+manual
    • https://static.s123-cdn-static.com/uploads/4371267/normal_5feb768ecdc88.pdf
    • http://centerbluebadge.com/90954662020su03f.pdf
    • http://xevusezes.medianewsonline.com/rikenezitawotirodi.pdf
    • http://uscarinsurance.info/ti-nspire_cx_ii-t_cas_2019n9zfz.pdf
    • https://static.s123-cdn-static.com/uploads/4403273/normal_5fed6b23adb02.pdf
    • https://cdn-cms.f-static.net/uploads/4451750/normal_601bbcd9b1cde.pdf
    • http://udilische.club/44182837338zx9ly.pdf
    • http://legendarycraft.ru/zigavukoxodhi86.pdf
    • http://vknart.xyz/73593796014qqlx9.pdf
    • https://cdn-cms.f-static.net/uploads/4489056/normal_6060f437a43e6.pdf
    • http://pressit.fun/the_bonesetters_daughter_summary_chapter_by_chapter5zqe1.pdf
    • http://fafikup.scienceontheweb.net/healthy_snack_ideas_for_adults.pdf
    • http://medway24.com/31743793874id9f5.pdf
    • http://rewita.fun/is_harry_potter_going_to_be_on_netflix_november_1baz2l.pdf
    • http://ing-cliente.com/best_continuous_lighting_kit_for_portrait_photographydzrjj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_2192a5e8f7bb488184b0672783194d84.pdf?index=true
    • http://suxudogakol.myartsonline.com/13332550320.pdf
    • https://beca70af-11ea-46d2-a649-d7fd44c468ee.filesusr.com/ugd/dd41e2_95e0dbececcc47c1985c47ac22f21898.pdf?index=true
    • http://xarilupinedup.myartsonline.com/brgschaft_miete_eltern.pdf
    • https://d7504aae-3d37-493f-8789-a5629a6fcc30.filesusr.com/ugd/7ca9f5_3ecd57b42d5d4353aab733a32b60d1f0.pdf?index=true
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_e0e9ce4f2ca243c3bdb6dd99e0a86c41.pdf?index=true
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_44b206dd5eb1475893b343a96b693b44.pdf?index=true
    • http://zowofiz.myartsonline.com/advanced_mathematics_an_incremental_development_2nd_edition.pdf
    • https://f171294f-ed7a-4884-a773-1e826a512430.filesusr.com/ugd/20d861_702e93fa43ae459996a3abc41bf7a711.pdf?index=true
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_3aef04ee4bb24f77bed08435f06c566c.pdf?index=true
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_afb174f387424323bca132ead8dca2f4.pdf?index=true
    • 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_off0001017f.bin
c5a7d54b00e91c1f4cb2b61c4cecc14d16bab6aea42d64e8eabf189f73484564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1017F 5692 bytes
font_01_sfnt_off000114c9.bin
cb00421fca43962718e1dfd143a4f5985fa132b9a43ed137a8d24cfa34e2d86e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114C9 11336 bytes

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