Malicious PDF — malware analysis report

Static analysis result for SHA-256 912011d6c522d255…

MALICIOUS

PDF

80.8 KB Created: 2021-03-29 07:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f5cae3deeccacc856a38826d31ebe14 SHA-1: 7ee3e3954843412746db7fc4662280ca616d312d SHA-256: 912011d6c522d255f295e3051e1095900f7adfcd8e391eb65cdcabf71b5d0a8c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the 'CLAMAV_DETECTION' for Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to game rules, which is a common tactic for phishing or malware distribution. The presence of multiple unknown URLs strongly suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://jumiwimov.ru/award?keyword=caverna+board+game+rules+pdf
    • http://mishgen.com/9720451502db572.pdf
    • http://evakuator-uga.ru/pelifa41k4u.pdf
    • http://clipshd.design/chronicles_of_narnia_2_full_movie_onlineist4k.pdf
    • http://copyrightsafetyhelps.com/75128544004jle7.pdf
    • https://cdn.sqhk.co/govulasem/jigixs3/best_slow_rock_songs_of_the_70s.pdf
    • https://cdn.sqhk.co/tefozakozup/ggjd77S/jobuselegeti.pdf
    • https://cdn.sqhk.co/furigelo/hhjqyjh/moksha_yoga_schedule_montreal.pdf
    • https://cdn.sqhk.co/jonuwezipagi/dwnGic7/92358374897.pdf
    • http://accueilcmb.com/is_the_book_of_jasher_part_of_the_bible5yysd.pdf
    • https://cdn.sqhk.co/wuzexesetaba/hgcibC7/genomalirakuvokujedewesib.pdf
    • https://static.s123-cdn-static.com/uploads/4408336/normal_5fce4fc4b6604.pdf
    • https://cdn.sqhk.co/jimavidozeze/aZkSBjb/tuzowefogapudaw.pdf
    • https://static.s123-cdn-static.com/uploads/4366010/normal_5fcb309ac5a6b.pdf
    • https://cdn-cms.f-static.net/uploads/4413374/normal_60469a3fdb2a5.pdf
    • https://cdn.sqhk.co/vinogusi/idPhd1q/91740803126.pdf
    • https://cdn.sqhk.co/jejekije/jaUoghm/hdfc_diners_club_card_apply.pdf
    • https://cdn-cms.f-static.net/uploads/4454550/normal_605bbed087cae.pdf
    • https://static.s123-cdn-static.com/uploads/4384307/normal_5fcb76bb732e2.pdf
    • https://cdn.sqhk.co/rukokota/nzxk5Mr/devil_may_cry_5_secret_ending_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_c9e7975e56784f5cae4ea0367dce434a.pdf?index=true
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_44701ded219f4da7aae9eed3cf31727d.pdf?index=true
    • https://s3.amazonaws.com/tiluwisulepam/honeywell_wifi_thermostat_not_connecting_to_internet.pdf
    • https://s3.amazonaws.com/sepawi/63246953210.pdf
    • https://s3.amazonaws.com/wovisak/cell_membrane_transport_worksheet_answers.pdf
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_cca6019d48db43b2b0b392c9147adc4e.pdf?index=true
    • https://s3.amazonaws.com/lanubili/wetemudidufinukalagixep.pdf
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_7b028fcaed1b4301a7a9e1389b48e703.pdf?index=true
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_2a9fc51fbafb413ba4a11af852084954.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_off0000fa18.bin
fb5bc5b4a5119d80ed4183a4b49183e492fd1993c264dc41864493ff5d7c9534		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA18 5468 bytes
font_01_sfnt_off00010c9d.bin
f18a46852bb7918261aa0c7048de8a81fd2f217fbf6ac8a99d8be0151cd21d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9D 12532 bytes

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