Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aeee0b5226adfd9…

MALICIOUS

PDF

74.7 KB Created: 2021-09-10 16:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a30e1cbc73870425d9155a1f89d89ea6 SHA-1: 47f5787f3d81d12919fe0630cea000a63cf308e6 SHA-256: 9aeee0b5226adfd91e2705b11c5d5d33d1fa8de9505226cd56333b8af278b494
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous links to potentially disposable domains suggest a phishing or malware distribution scheme. The document body is heavily obfuscated and appears to be non-readable content, further supporting the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://playerpress.com/ckfinder/userfiles/files/kasomurulajejirop.pdf In PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/mudob.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/a6435089fe80451023fe53b29045beba/94388111787.pdfIn PDF document text
    • https://rais.bg/uploads/file/44555402720.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/21563190873.pdfIn PDF document text
    • http://hocomesun.com/upload/vaxibepog.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/52127971022.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/xuxag.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/lazuboworarodiwakusix.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/37441283018.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210910182152.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/94836381530.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/zutej.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/dofuxaxa.pdfIn PDF document text
    • http://cbafjvn.com/uploads/userfiles/file/donupusesobetekufufu.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/28120196192.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/71828284514.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/vizurimod.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/lereru.pdfIn PDF document text
    • https://alariel.be/userfiles/file/guxemeluwite.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/zagus.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/disewizenoxozifaxamu.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/kamiwegamunugurex.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed1e3ad54b---zopetakobosukegefami.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=suryavanshi+full+moviePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC234 10736 bytes
SHA-256: a2d8f54b545052d3d4739cf488ef2adb34a21f2a99c569a9dd71c6e573b5d734
font_01_sfnt_off0000daa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA4 16820 bytes
SHA-256: 84ec452c5f1cce3a9d4c798cc4cfac86e573cabec0b7a278002405b3183b646f
font_02_sfnt_off00010572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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