Malicious PDF — malware analysis report

Static analysis result for SHA-256 30aaba22a58a720c…

MALICIOUS

PDF

82.0 KB Created: 2021-04-20 05:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99e8dc9cca7072eed3a2e1ed93d8a784 SHA-1: 147f1d77f674c88f70617599806099c4c22ba9e6 SHA-256: 30aaba22a58a720cf84ca05a6bfd63306cdfc5ad561b05f82030220cd0c9c056
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. ClamAV and ML classifiers confirm its malicious nature, flagging it as phishing or a trojan. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

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://ponafet.ru/strik?utm_term=craftsman+drill+press+parts+canada
    • http://modozadubop.mywebcommunity.org/is_wd_my_passport_ultra_ssd.pdf
    • https://static.s123-cdn-static.com/uploads/4413119/normal_60030c9c474e7.pdf
    • https://static.s123-cdn-static.com/uploads/4493589/normal_5feea5c38f8b5.pdf
    • http://fulifubajamo.mywebcommunity.org/61509076760.pdf
    • http://fusekimutoxi.sportsontheweb.net/karazowavobusuwoleso.pdf
    • https://cdn.sqhk.co/jigugabopu/jfpG6Cl/stickman_rope_hero_apk_indir.pdf
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5ffa8bc93f7d7.pdf
    • https://cdn.sqhk.co/jabosuve/lG3hfvt/zimozexod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_e389f05af93749d0834f74bb457c847f.pdf?index=true
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_156f455c386f49d68f6299a7567e6f7a.pdf?index=true
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_a8db5de4c9ac45fca1ab31c97cacb729.pdf?index=true
    • http://zabamaxe.rf.gd/computer_ki_full_form_video_mein.pdf
    • https://uploads.strikinglycdn.com/files/73cd5e89-c55b-42a5-8bae-d3abc4e15fd6/10992798119.pdf
    • https://uploads.strikinglycdn.com/files/270f3d57-cb9a-4766-98c6-c0a974d5f2cd/interior_design_university_in_texas.pdf
    • http://dafiwogi.rf.gd/vopewunu.pdf
    • http://xidalagep.myartsonline.com/dirunuxizitupiso.pdf
    • http://bivojeda.atwebpages.com/28334229814.pdf
    • http://sufekowanak.rf.gd/daxakaxe.pdf
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_7868a1752a524bf999059ac812d9dea4.pdf?index=true
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_a7644eaaf0b54b3cabf98bb581cef9b5.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_off000101d3.bin
2bc6b46610afd18b7cd7f8a8fa1c42053f2122271310224b3cc3373ec9c5e6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 5208 bytes
font_01_sfnt_off0001136f.bin
5c4b3e02ece746297ec349c22f77c2b8007fe9ee0daa40b1529740cb7757f148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1136F 11544 bytes

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