Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af5482342f2ff57…

MALICIOUS

PDF

81.1 KB Created: 2021-02-26 07:13:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 546122fde066f911e22e393a1a6b2e56 SHA-1: 88759cc8137dc3daccccc92d6efa9573bf11b575 SHA-256: 8af5482342f2ff5765504d7d068f427fed762f558ff56d96ed7275e75a0e9922
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to potentially malicious or phishing sites, and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure the true destination. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's a lure for phishing or malware delivery.

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://bologen.ru/strik?utm_term=the+elements+of+typographic+style+applied+to+the+web+pdf PDF link annotation
    • http://anarchymedya.com/o_exorcismo_de_anneliese_michel_livrizmy3.pdfIn PDF document text
    • http://monstergym.ru/ascaris_lumbricoides_cdcbjc5t.pdfIn PDF document text
    • http://energierecrute-emplois.com/most_viewed_80s_music_videos_youtubel0e4s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_5fd966ddc752b.pdfIn PDF document text
    • http://pagebake.com/asus_tinker_board_android_8v66jf.pdfIn PDF document text
    • http://mists.space/86693081008u5o0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464541/normal_5ffa3ee1655e4.pdfIn PDF document text
    • http://poxinezov.iblogger.org/35288542903.pdfIn PDF document text
    • http://universe1.space/20390653157no22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366961/normal_5fe53aa61826e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503033/normal_601c91e532c66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_60175777e3298.pdfIn PDF document text
    • http://pl50off.info/salat_al_istikharazpz7d.pdfIn PDF document text
    • http://magnifioco.site/159980899320yr23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369786/normal_60091cdb24382.pdfIn PDF document text
    • http://klyshsheff.xyz/dragons_of_atlantis_generals_guidec0b16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_602092f432479.pdfIn PDF document text
    • http://curvepreloved.com/mamalinufagadafozofujuki9odng.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dereduvate.epizy.com/79948969681.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94B 5852 bytes
SHA-256: 5c66bf3c0d724dcb3ad044a22ac0005c7c18c6fe8dc9a55c6b66f24f0c1a2081
font_01_sfnt_off0000fd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD22 10780 bytes
SHA-256: 18c71c555971cc9d4f790e96c3e294b1a25ba4396ac6ccc70578226ee49bb324
font_02_sfnt_off00012206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12206 16060 bytes
SHA-256: 5b45d8957cdd618c0f157c507058aef1810e6158bb3d1abf257796d6008f54d1

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