Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e6ce84cc494034…

MALICIOUS

PDF

82.9 KB Created: 2021-09-12 08:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da229051445f6f5a5f35d2047131025b SHA-1: 29c9be0fcd52e66d651eb24847f9dbff682ef913 SHA-256: 30e6ce84cc49403494aaecb9408a0890a21548f891d7fe903ad0eb64379c5813
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a link farm heuristic suggests an attempt to obscure the final destination or distribute content across many domains. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware delivery mechanism, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://seger.cz/userfiles/file/sofovuviwalitozupenudub.pdf
    • http://kimwendelldesign.com/ckfinder/userfiles/files/faxejifi.pdf
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/58578955191.pdf
    • https://pnlcoach.com/misc2/file/
    • http://dajuicebarus.com/uploads/files/74120441676.pdf
    • http://www.scsk12.org/policy/files/files/xidib.pdf
    • https://greenfins-thailand.org/uploads/file/35424361851.pdf
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/94958189809.pdf
    • https://kawanmto.net/contents/files/23425955285.pdf
    • http://metrominicabs.com/survey/userfiles/files/xedavubotes.pdf
    • http://urgentcarepb.com/userfiles/file/28474825801.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/2856ce39fb78c6525e72bd0747473af9/59640683567.pdf
    • http://rosabaum.de/web/editor/files/zojobezusizip.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/25be5b9fac618051124b1c3d4d20b890/31471516915.pdf
    • http://mt-filtration.com/uploaded/file/179109179761392bbe8fc9d.pdf
    • https://rovetco.com/userfiles/file/87272528393.pdf
    • http://everestlodgelukla.com/userfiles/file/15816892927.pdf
    • http://finance-bulldog.cz/UserFiles/File/zetiluwujasuw.pdf
    • http://kaupa.cz/userfiles/file/gosibariwidaf.pdf
    • https://reviewz.eu/app/webroot/files/userfiles/files/63063334810.pdf
    • https://himarco.ir/basefile/himarcoir/files/faxizow.pdf
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/pidiwegukukem.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/81353506700.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=candy+crush+saga+mod+app
    • http://irodori.kir.jp/files/file/zovulijimufigavegebuxefaf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3f.bin
4b5871d224c9c9d9b2040ae3ddf8abc8f8d8d97f3d81809972794720ed306e4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3F 17748 bytes
font_01_sfnt_off00010d44.bin
3d57c6ed20d7669a2ef74699c049594c9b950cfe7c4697fc90d4eb1ff338b64f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D44 10840 bytes
font_02_sfnt_off000125e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125E8 16792 bytes

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