Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdd7750d4ab33b9…

MALICIOUS

PDF

94.3 KB Created: 2021-03-22 13:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10ca949d325869d6baadddae5b17ec7b SHA-1: bbf4e9f84c4388e3581a2acccf714e33a0403391 SHA-256: 9cdd7750d4ab33b9030223bbeba94eb137cc6347cd5bba6af454ae88bb85cdf9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with the primary URL being a suspicious domain associated with a link farm. ClamAV and ML classifiers also flagged this PDF as malicious, specifically identifying it as a phishing trojan. The presence of embedded URLs and the link farm heuristic strongly suggest an attempt to redirect users to malicious sites.

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://kuzutuzo.ru/award?keyword=retrait+des+actes+administratifs+pdf
    • http://kexisugotiro.22web.org/arkansas_state_police_crash_reports_online.pdf
    • https://tujezaxe.weebly.com/uploads/1/3/4/6/134616668/javagixinonasiluzez.pdf
    • http://mademupo.22web.org/functional_group_isomerism_chemguide.pdf
    • https://gekigojux.weebly.com/uploads/1/3/4/3/134339050/sofixitovo.pdf
    • https://kupowenip.weebly.com/uploads/1/3/4/0/134042521/3812730.pdf
    • http://dapunoxideran.iblogger.org/tazidozalubojugiguvuke.pdf
    • https://motovonesavot.weebly.com/uploads/1/3/4/6/134690882/juruxamogeguwoj-fifulegosobav-xezazalelaku.pdf
    • https://sugodaxekot.weebly.com/uploads/1/3/1/8/131872070/3adfe73d76d86.pdf
    • https://dufofumiwiz.weebly.com/uploads/1/3/5/3/135309849/aa569bf39a10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_759e16808d5d40a984cb30ac55e7db4d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/540a6542-847d-4e82-8411-e11a36991a40/mugipum.pdf
    • https://uploads.strikinglycdn.com/files/3ea719d0-1d04-4478-9b5d-a12c498d193d/7570043422.pdf
    • https://uploads.strikinglycdn.com/files/3310482e-9585-48af-b99d-93a10c165686/70956525080.pdf
    • http://bebukoruwuru.epizy.com/sotukoxoxafajiviniruje.pdf
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_c17015916fa149a48dfa408e6071bff1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/03849a3f-6b74-48b8-9831-38d0fd0ffbd8/what_the_difference_between_mini_14_and_mini_30.pdf
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_5244d5b7a7ba4a3790b4a3685a5d8bef.pdf?index=true
    • http://nesazovopiw.rf.gd/tamil_movies_2019_full_movie_online.pdf
    • http://peregal.epizy.com/human_anatomy_and_physiology_lab_manual_11th_edition_answer_key.pdf
    • http://texatutegelemov.rf.gd/pefazelojugotugaz.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131a4.bin
3ab2436e63c054e25d11c7d08e9b898091bc386fd167ad1034d85ce1d603c241		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131A4 5276 bytes
font_01_sfnt_off00014388.bin
3d0cc02a907e829461d7b4bf8b5ac154615a587c6fdfdead5f461cf9df139cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14388 12244 bytes

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