Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da68ca76a3f6d3f…

MALICIOUS

PDF

69.2 KB Created: 2021-03-27 15:25:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 065cb67a03f0d317f8d8043973ce231b SHA-1: 71603034155a34a1498b020d56bad3280983bf5e SHA-256: 4da68ca76a3f6d3fd14785e8ef271c31cda43a2934dbb7f669fece9aaf0f7650
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing sites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics point towards the document's primary function being to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=anniversary+images+with+name
    • http://goodshopsales.xyz/58113634074kfh7u.pdf
    • http://vvinorama.fun/nozotenebofejuputexezimivcqn2.pdf
    • https://xikofekukinakij.weebly.com/uploads/1/3/2/6/132681309/gixikikusidinemu.pdf
    • http://nawabopebi.iblogger.org/lubibebudikikovikili.pdf
    • https://wilumixomili.weebly.com/uploads/1/3/1/4/131483065/1693125.pdf
    • http://aduo5.online/shri_guru_granth_sahib_file_downloada216x.pdf
    • http://1yamal.space/jafimavokogafbt421.pdf
    • http://pokypka.xyz/812273186894uld0.pdf
    • http://itdiscount.info/mike_ma_harassment_architecture4mcne.pdf
    • https://jurajewokikum.weebly.com/uploads/1/3/5/3/135349146/lorakorex.pdf
    • http://coins24h.com/how_to_connect_bose_companion_3_to_samsung_smart_tvt86vg.pdf
    • https://fifukujujaki.weebly.com/uploads/1/3/2/6/132680890/7d47b03.pdf
    • http://vulofinize.22web.org/63846349900.pdf
    • https://lumosezuto.weebly.com/uploads/1/3/4/4/134499790/c4784746d69c18.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_c45e7aabee514dc7bf0009a72a5d669a.pdf?index=true
    • https://s3.amazonaws.com/fujadabez/gufuwafifaroma.pdf
    • https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_99a75736a580446da1a8cac6c3119cd7.pdf?index=true
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_09a09129a9804eefa0341fbd174499b5.pdf?index=true
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_cf25647011234d9bba1507e1b084d95a.pdf?index=true
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_9cd904ca147f432795b16731a011c38a.pdf?index=true
    • https://s3.amazonaws.com/vukusa/batudalibi.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_off0000d324.bin
ef3d271b6792f5917186d6585cfb3a8e5552e91276013644fb0c2f0d487239f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD324 5308 bytes
font_01_sfnt_off0000e527.bin
7d5caec23cfaad64de2526eb47410534d0f1c8e3f33e96d957cecfc80d768a38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE527 10088 bytes

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