Malicious PDF — malware analysis report

Static analysis result for SHA-256 0106edd16ac05836…

MALICIOUS

PDF

75.4 KB Created: 2021-03-28 01:11:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 752568fe779bd58259d96fcaa04294ac SHA-1: 6f6c3e65d13d7152786594aa387c6d6c84508344 SHA-256: 0106edd16ac05836e246a95cb958b3c2f5f195e0c3fb87e6354de0de4f227f66
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=2nd+grade+math+reading+books
    • https://cdn.sqhk.co/dodamewope/iiaLGS3/free_70_s_disco_music_downloads.pdf
    • https://cdn-cms.f-static.net/uploads/4380380/normal_60587951875ce.pdf
    • https://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/nasabu.pdf
    • https://static.s123-cdn-static.com/uploads/4486221/normal_60069e976ed9b.pdf
    • https://cdn-cms.f-static.net/uploads/4366406/normal_601a3388391af.pdf
    • https://cdn.sqhk.co/pavetikedur/gcahgoN/taxomiviminuj.pdf
    • https://cdn-cms.f-static.net/uploads/4422386/normal_6041a18dbc189.pdf
    • http://mosebuzixat.mywebcommunity.org/sutoju.pdf
    • https://sudoxelavekif.weebly.com/uploads/1/3/5/3/135305243/4518224.pdf
    • https://cdn-cms.f-static.net/uploads/4414501/normal_604cc58e504e9.pdf
    • https://veraroligesabo.weebly.com/uploads/1/3/4/3/134377370/jasotedifaxaxozu.pdf
    • https://cdn.sqhk.co/xejexeremiso/j0mghif/switch_pro_9100_4runner_install.pdf
    • https://cdn.sqhk.co/lokijuzim/aidKgdc/color_wheel_game_y8.pdf
    • https://cdn.sqhk.co/takoxuwal/N1gh3hh/finemepigad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/suxiweke/27309588325.pdf
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_bb56be5d9e78469b9eeb71ff8086f3f9.pdf?index=true
    • https://s3.amazonaws.com/wexukufedepim/justice_center_ny_reporting.pdf
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_20a3b7f86aa34ad08db05085df1379cb.pdf?index=true
    • http://pisonepegosa.myartsonline.com/how_do_i_contact_the_post_office_about_a_missing_package.pdf
    • https://s3.amazonaws.com/dibedamoka/buduj.pdf
    • https://s3.amazonaws.com/xulikamul/99707714294.pdf
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_9a956b746f7845df9be232913ee04229.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_off0000eafc.bin
012ff82f60f740c3828c74c487627a90253821788fca4c2b744f19cb203145cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 5448 bytes
font_01_sfnt_off0000fd57.bin
62a1ab7aefc2da4ca3e80dd9f3be14f0d049eee521f1709ec6611cef9821cd62
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD57 10604 bytes