Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d22959a6178a34…

MALICIOUS

PDF

79.5 KB Created: 2021-03-02 13:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 957c588427b392e3f050813dd8c604ea SHA-1: eb0de6bfa7eaa27b6a5681d48e53e5a0e7d1d87e SHA-256: e8d22959a6178a3481980971b8ce8d231bfc6aaac52ee710fb986769f0d293b9
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a second-stage payload or phish credentials. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://lozipotod.ru/strik?utm_term=pixma+mx922+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fcecd71606b2.pdfIn PDF document text
    • https://rufuwoja.weebly.com/uploads/1/3/4/7/134735928/8512762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_6035cdc506193.pdfIn PDF document text
    • https://mezemefi.weebly.com/uploads/1/3/1/3/131384279/walevi.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/fasozamalaxutije.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/dgcCjou/motorbike_rider_nitro_motorbike_riders.pdfIn PDF document text
    • https://tipolapuponawog.weebly.com/uploads/1/3/2/6/132696210/sotaxizobufeporikuji.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/geRgZia/brick_game_pro_19._4._0_apk_download.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/jozikuguwoxexebirez.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/iihgid1/83567008039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393208/normal_5fcfa330eac38.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/free_math_worksheets_for_2nd_grade_addition.pdfIn PDF document text
    • https://tulopesonu.weebly.com/uploads/1/3/5/3/135318186/rafipesa_gikosa_sorojatezozin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_6025a5755fe87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_603803968d9ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367937/normal_5fff4f04e12ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_60380501c45fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juludiripo.myartsonline.com/tezopuxomuwalizeraxipeli.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/album_songs_malayalam_status.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/10493344285.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/wemivanaxotunodukot.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/salesforce_certification_questions_and_answers.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_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 5132 bytes
SHA-256: 333e350281b952e56df4b8cdcd9dc37ec4f4ea9ad2f8ab103a4fd5fad7684565
font_01_sfnt_off00010ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA8 10572 bytes
SHA-256: b45568799fecc334812b532b7879c7d704aeae2b5ca3c7ab42fb2c1b58f063dc

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