Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d246105aee3bf6c…

MALICIOUS

PDF

73.2 KB Created: 2021-09-12 21:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6080e4f506fcd458d574066d0e61b4c0 SHA-1: cac4cf8bb0179682dc2ec3737716cab3ae3cf20d SHA-256: 0d246105aee3bf6cd3be25d50e425d1754b07405d8660e2b71806c0ec1bf7fd3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is identified as a link farm. This suggests the primary purpose is to redirect users to potentially malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://archism.ru/uplcv?utm_term=covet+fashion+android+cheats PDF link annotation
    • https://francois-daulte.com/ckfinder/userfiles/files/juritatenapugigukabew.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/19664411042.pdfIn PDF document text
    • https://ever-progress.com/upload/files/52671485784.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/94478598342.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/17588849111.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/raxasunobalol.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/gozof.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/xowupanokukij.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/9188452648.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/99770052784.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/lorovolubevu.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/lavigafupovuwupa.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/jagulimeluvevivaxubexuje.pdfIn PDF document text
    • http://efcosmetic.com/uploadfile/files/meremigunenukidedepisalo.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/larulexatudepasezixo.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/95924058577.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/wujefujagimuwape.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/54064496484.pdfIn PDF document text
    • http://cosyromania.com/media/file/navofotafevanomev.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/78002266427.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/73050267023.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/wokoginilofopibawuxilofa.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/62887135202.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://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_off0000bb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB04 10624 bytes
SHA-256: ac72aab124992a5f80c72aec454204d130606df7f1797ae29c26e0425be5a018
font_01_sfnt_off0000d35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6E 17000 bytes
SHA-256: 66b59bc2ad8248924535efddb09cefc017e6825ad3b0c05db1af2953b06204f1

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