Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d096b6676778bd2…

MALICIOUS

PDF

70.2 KB Created: 2021-09-18 00:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ccc99d994a432f5703b45c6c55320e7b SHA-1: d9c7d3eddcb82407c31366ae982264b6d47b0ff6 SHA-256: 1d096b6676778bd20858c851945acd5fc8973a23e01ac0cdd40cf3762507a12e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are identified as part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/depumonolabakuwakujofige.pdf In PDF document text
    • http://arucax.am/user_images/file/92696143744.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/vosenejuto.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/77440047086.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/siwomidawavololer.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/29021756222.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/tubevedezevaximovafan.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/zovixobasefojotenikoduv.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/32290667087.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/tolonataduvef.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/jurubelosim.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/pazimutegujopinef.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/81448380415.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/97560691210.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcd50ac95b---jifoxafuzakudax.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/58822125096.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/65207101560.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/231271153.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/sufigubibolujenemi.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/40001578333.pdfIn PDF document text
    • http://unitekinfostructures.com/userfiles/file/12439887606.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/59284997817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=watch+line+of+duty+online+freePDF 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_off0000b2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D4 15720 bytes
SHA-256: b78bfd6acf287b81eff4d182f3150a48edb82be1da72318614666262b44fdad5
font_01_sfnt_off0000db29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB29 10612 bytes
SHA-256: b28b33509ad6a09bc0be6a1f773680f585609b2ce398644e8afde57a0876696f
font_02_sfnt_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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