Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae30896d9c7dbce…

MALICIOUS

PDF

75.0 KB Created: 2021-03-03 00:37:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8a0d60ea3ed4027e4c30f55bd4ecf03f SHA-1: ecfced7c58e84a80984c03fe4dbb4f89b7486f00 SHA-256: 0ae30896d9c7dbcecae13a33eab9896cc42999a1b79b11080cbda5ed91303b1b
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a primary one pointing to 'https://mezovuduw.ru/wix?keyword=collections+framework+in+java+pdf', suggesting a phishing or malware distribution lure. The PDF's structure and the presence of embedded links point towards a spearphishing attachment attack vector.

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://mezovuduw.ru/wix?keyword=collections+framework+in+java+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417662/normal_5fed54a092e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393925/normal_5fd1b4e14588e.pdfIn PDF document text
    • https://fujuzelos.weebly.com/uploads/1/3/1/3/131380065/rawit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5fc60a808382c.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/wimifurubaweba-keriveb-dafofesevan-xunovubox.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/wejudajavitubegafa.pdfIn PDF document text
    • http://bafakuvim.sportsontheweb.net/61255571655.pdfIn PDF document text
    • https://jukosixosibi.weebly.com/uploads/1/3/1/8/131871462/gajuzas_semot_fizevemogumovo.pdfIn PDF document text
    • https://cdn.sqhk.co/bejadelu/BjeHhjH/homeroom_in_spanish_means.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fazafof.rf.gd/19637107640.pdfIn PDF document text
    • http://niserikotul.rf.gd/big_ideas_math_answers_blue.pdfIn PDF document text
    • http://bumitorazefi.epizy.com/why_is_my_frigidaire_fridge_not_making_ice.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/can_i_use_alexa_to_control_my_roku.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/waximiputuwatikowa.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/ladoduk.pdfIn PDF document text
    • http://kajifota.epizy.com/why_is_my_toshiba_tv_light_blinking.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 5500 bytes
SHA-256: e5b135984fc23b29c5b0b06303105c96e838924db333ada1d4824b1d6c297d47
font_01_sfnt_off0000f6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6ED 12540 bytes
SHA-256: 0865f5394317a74fbf420ed150a3d4a9f63ee531e2659354f020aa382ef9e116

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