Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14f521b8d4dabc9…

MALICIOUS

PDF

71.8 KB Created: 2021-03-24 10:23:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99fed92ad9a2bd9d6a304536f94022ff SHA-1: d09e07c40d65c8f24a57b744171320f9c64dcf6b SHA-256: c14f521b8d4dabc9581ac347e387458c2f6c00d7c2b87f6a3dbf591ffadc9e69
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm and is flagged as malicious by ML classifiers and ClamAV. It embeds external URIs, with the primary suspicious URL being 'https://jumiwimov.ru/award?keyword=body+beast+worksheet+pdf'. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=body+beast+worksheet+pdf
    • https://cdn.sqhk.co/xusarukave/Wgjjfkg/lirinupirazitalituxumep.pdf
    • https://static.s123-cdn-static.com/uploads/4501208/normal_5fcf8bf149e78.pdf
    • https://cdn.sqhk.co/rojarimeg/gKDibje/pujeg.pdf
    • https://cdn.sqhk.co/lilomovetum/ifEMmjg/top_freedom_rock_songs.pdf
    • https://static.s123-cdn-static.com/uploads/4487665/normal_5fcc556e84861.pdf
    • https://cdn.sqhk.co/bitomasijelo/dF6Yij8/kik_application_download_free.pdf
    • https://cdn-cms.f-static.net/uploads/4417653/normal_5fd3c9be0009d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fasudikek/39486431556.pdf
    • https://fbaba6ab-37cf-477f-82bd-e10a416eccda.filesusr.com/ugd/3c8574_f15c6329076746e5a0f7ef4e43f51506.pdf?index=true
    • https://ad177677-9664-42cd-9bf2-17a10eef6e1d.filesusr.com/ugd/f8915e_3d1cbea9facf43478bcb68ff62bb29c1.pdf?index=true
    • https://4e4608fd-868e-43f5-b6ba-14e5e4b50785.filesusr.com/ugd/b1f235_2fa922a2cc9d44cdbe96e71063f1ec67.pdf?index=true
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_31077b010c4b4812ba26901d8cd4a29b.pdf?index=true
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_e19dad4207e04aeab4c6497c1fb81e12.pdf?index=true
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_422e52f9cc0b43179147006d9a202123.pdf?index=true
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_ddbe1d7c96704ed4986a041565f4c865.pdf?index=true
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_624bc992c7cc4263bdc08f38b957429f.pdf?index=true
    • https://s3.amazonaws.com/fodose/what_is_the_healthiest_thing_to_eat_at_el_pollo_loco.pdf
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_6e15bce730fc4863afa3e2645d44e35d.pdf?index=true
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_70a456ec59de41f7bf1b657d6b03438d.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_off0000da4b.bin
3fa9b8d4ed366dfb71381439ed87df5e48c318aaea906f5ac359de8e72ff6b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4B 5544 bytes
font_01_sfnt_off0000ed38.bin
0383df798f9688d64fe5abd47137f746b9d1065dadc06ca19203f47ae8f11a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 10832 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.