Malicious PDF — malware analysis report

Static analysis result for SHA-256 80641dcf309a2c24…

MALICIOUS

PDF

106.1 KB Created: 2021-07-23 15:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 751075a00e393106929a1a1c8219c98e SHA-1: 3f70f9a110364524b612735694e5aa7de3c1d19c SHA-256: 80641dcf309a2c242b22bdc9335bff356fc210dda9bd037e95bf13973b2e4d5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27c0b8d5c7---15092402096.pdf
    • http://magogaralbamoble.com/galeria/files/76561140336.pdf
    • http://brezov-gaj.si/uporabnik/file/poxadawipobimegu.pdf
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/kalabekibasewuzerisaju.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a444c817e0a---16278840850.pdf
    • https://zoorichi.com/temp/fckeditor/file/notupibu.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/b21a6d19f611bebe6fcf3dce089f9105/bipokepokusopi.pdf
    • https://equantumconsulting.com/files/files/jexegevexili.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e9da5cbc90cb238a4762e26960ae431/65900413626.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d05493f551---sepofip.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/5bd4ba2840f9c55764944be39b0c5a82/16047563814.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/8jd87hsdt5ps9q1ih2ptu7k89d/radexaj.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa155c7cb8---85314289372.pdf
    • http://barudan.hk/UploadFile/file/20210602233511700.pdf
    • https://pbchistoryonline.org/uploads/file/mugisajezufaruli.pdf
    • http://sochisushi.nl/survey/userfiles/files/55355555891.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/zabumowisitusameku.pdf
    • https://shiphangnhanh.net/uploads/image/files/bukapewigesenepodebof.pdf
    • http://isagenixmakessense.com/ckfinder/userfiles/files/pajolegumeti.pdf
    • https://everestart.com/images/stories/file/ruritarigukavisetuzegaxi.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f435083504---69810304371.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/wekafamufovubuluv.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2d7318a38---77733819531.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073aa8365ce8---xelav.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8a12da2b4---nagufuzorijokalijusosuxe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=aiag+iatf+16949+pdf+free+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a4c.bin
61e805589753174cb7e6414e3d6ca6d2378498550ea8dd635b523344746c4fd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4C 11040 bytes
font_01_sfnt_off00013403.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13403 16792 bytes
font_02_sfnt_off00014c15.bin
12417991bea9a33090ac23d6a66ace6a47f9f1d9c1bc686242ab7cf42c3e171b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C15 19932 bytes
font_03_sfnt_off0001809d.bin
0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
pdf-font-stream PDF embedded font (sfnt) at offset 0x1809D 16448 bytes