Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3119a135b360e90…

MALICIOUS

PDF

83.0 KB Created: 2021-03-23 04:11:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d52a9b6fd7a49c8a720a5f4b7f55469 SHA-1: e252aacbb0f01c69480f92efa8a06f573b655db1 SHA-256: f3119a135b360e9021276ba2c3738a82b3fbeea5ecae639057df71fef4536831
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://nipisod.ru/strik?utm_term=six+sigma+white+belt+certification+cost+in+india
    • http://dawexowad.iblogger.org/what_to_name_my_puppy_dogg_mp3_download.pdf
    • http://universal-kirov.ru/mosigel7w39t.pdf
    • http://tur8osale.site/homemade_rifle_cleaning_standphmis.pdf
    • http://genoray.pro/42521563516xsw9n.pdf
    • http://springtea.space/kizogitzjv16.pdf
    • http://rentline.pro/86732826076p7rt0.pdf
    • http://visionnew.xyz/dalakemojezugekonimegivv5m.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_f07aaae940294e07b7206b60a5cff704.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b3c08681-2b6b-48e6-a37a-270725315efd/is_moultrie_ga_a_good_place_to_live.pdf
    • https://uploads.strikinglycdn.com/files/875f8187-fe53-4be2-8b42-0640d944eb88/timuvoxosowepetilop.pdf
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_5bcd19d177d346a5b0d460dc0fbff52b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a9acc629-fdc3-479d-8168-15edff6bbd43/how_to_live_a_healthier_lifestyle_in_2020.pdf
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_ca0bdc75c1ea474eb0150b0cea89343d.pdf?index=true
    • https://012a8781-80b6-4d33-8f63-56d56ef93f15.filesusr.com/ugd/6d3794_ce7e5be043a84b078a782c03addbb9c7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ff67ac9c-3d3e-4624-8672-7cd5336444f2/jvc_kd_r330_manual.pdf
    • http://peguretunemidom.rf.gd/ipcc_report_upsc.pdf
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_21ef19a0776544e0ab01759d819c5a83.pdf?index=true
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_72a98caf4189432db21009cef8c84744.pdf?index=true
    • https://uploads.strikinglycdn.com/files/34ce9cc3-b57b-4523-b739-8327c7c05144/enron_the_smartest_guys_in_the_room_movie_questions.pdf
    • http://tereralubo.epizy.com/menoma.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee80.bin
1596ec97d066336d6b99ab3a2681753c39dc3742a2254d516cbbae266c323813		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 5836 bytes
font_01_sfnt_off00010249.bin
753067507d47e405128705d2cc526fc30c12551a054ce9913e53685d229ebb36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 10848 bytes
font_02_sfnt_off00012764.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12764 16164 bytes

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