Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c7191aa9d4938f…

MALICIOUS

PDF

82.2 KB Created: 2021-09-16 19:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 45ee780b163564b385fd79912ece385a SHA-1: ba4f4a9e17d232e725baa344afaaa7ccfde8cdf9 SHA-256: 07c7191aa9d4938f02e9810038feab3c166322c833da79f6523399ce0a6bd776
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to deliver second-stage payloads or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://nomylo.ru/uplcv?utm_term=extreme+car+driving+simulator+hack PDF link annotation
    • http://cowmoo.org/ckfinder/userfiles/files/14950115393.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/zorofefodezufuxuwenebiro.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/95439421553.pdfIn PDF document text
    • https://sainaudit.mn/File/22774353504.pdfIn PDF document text
    • http://polkovnik.su/upload/file/85026035823.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/80200191444.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/filobuzakewaliniwixeji.pdfIn PDF document text
    • https://yodobashi-church.com/92521773107.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd150e568b---korojebamemajesal.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f5fb7bca7---wexebisifazaze.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426fec037b1---datexalepaxado.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/36603996410.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c1fa499cf---jepanuberasawesonup.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/65438489682.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/22986692349.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/sesuvebuvuwusijuminiwaxe.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/newokexalumogomi.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/vimedikobomefapikol.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/4481645339.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/zaxonesizevalutobabukuzes.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/82242872741.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f516227a26---28081541720.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_off0000dc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5D 17404 bytes
SHA-256: 07e96993672ecc10d6f979df603dabe6183e65e53fb012ab249c52fa4be9ace4
font_01_sfnt_off00010966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10966 11160 bytes
SHA-256: 7ba225e2f91ea7a47ba98985100d6e73d20d68ea5a27a56c9d08ff0111e5a18e
font_02_sfnt_off00012325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12325 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.