Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ee1b41919d7683…

MALICIOUS

PDF

76.8 KB Created: 2021-03-22 09:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 10e88eb9d3e10d13820d4c69de920b37 SHA-1: 229fcc2418caf44226d9aee2d83ec4811232fb0e SHA-256: 38ee1b41919d76833108c8be1840d206f1542add009d38984b517251300c2f12
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically referencing 'Badlion client 3.0' and leading to a suspicious domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further compromise.

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://seumenha.ru/123?utm_term=badlion+client+3.+0 PDF link annotation
    • http://kawafopi.mygamesonline.org/75101050116.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/noborojivajuzegu.pdfIn PDF document text
    • https://totaduwuvib.weebly.com/uploads/1/3/0/9/130969262/jugagedu_sidejaza_nazozejugiso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482848/normal_5ff34acc1bada.pdfIn PDF document text
    • https://cdn.sqhk.co/toviranevu/fgikQVW/57322673380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_600ddc0f7d84c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_60215d14a4b92.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/search_text_in_outlook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404723/normal_601a0b63ad278.pdfIn PDF document text
    • https://cdn.sqhk.co/safajoju/2jcnES9/auto_call_recorder_for_android_mobile.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/31888181216.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/cessna_182_parts_catalog.pdfIn PDF document text
    • https://vinebikeja.weebly.com/uploads/1/3/4/7/134712271/9439011cf202d.pdfIn PDF document text
    • https://nelunozulugekis.weebly.com/uploads/1/3/0/7/130739970/jimuworuxifoz.pdfIn PDF document text
    • https://fejilezujew.weebly.com/uploads/1/3/4/3/134340931/mikobugususu.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/CijNTjj/amtrak_train_status_northeast_twitter.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/clock_face_template_roman_numerals.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/dudurigejo.pdfIn PDF document text
    • http://bexovivuvere.myartsonline.com/metidijovuxoxaragol.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/xujaduruderukuriruwiluf.pdfIn PDF document text
    • http://vawirir.atwebpages.com/unit_forces_law_of_universal_gravitation_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/15628740345.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_off0000eed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED7 5044 bytes
SHA-256: 802d0e8d65b5fbf382a79fac7da3661bb85dbfc7c11bb9920a88b1aa46e49f1a
font_01_sfnt_off00010017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10017 11260 bytes
SHA-256: 3a2d0633d9ecfc8bea21618f73199137c5375995af08581de0566a494753ee71

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