Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc9dae60df5cb95…

MALICIOUS

PDF

82.7 KB Created: 2021-09-16 13:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3082b8646cd314e07f21ec89c16fcc7 SHA-1: 1577d341b9988b982f8f7c456d8ff54791232d20 SHA-256: 7fc9dae60df5cb950aaea3be6ab085ad1edbe2d35f597f31261a3cfdbda9e58e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, several of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and URI heuristics point towards a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://banderlogclub.ru/Files/file/7133954150.pdf
    • http://usagimatur.com/files/others/22222214319.pdf
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/kizejelofusulodo.pdf
    • http://banghetretruc.com/media/ftp/file/2618431844.pdf
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/dawonibumuresunuzekoreg.pdf
    • https://tideandtigers.com/ckfinder/userfiles/files/58638809238.pdf
    • http://ride.hu/images/uploads/files/72447868751.pdf
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/7693401636.pdf
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/48438060157.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/643kp4nvmajc4h3cbime424joc/sadajano.pdf
    • https://seerupit.dk/assens/file/farelixofupuruleneg.pdf
    • http://ventss.ru/userfiles/files/fanexuzusidid.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/53103b503bcca6c3befd00dc0b4564b8/29113179264.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29946538613.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3679dae56---tujupakururumikurezebur.pdf
    • http://aaaexpressac.com/userfiles/file/34070873058.pdf
    • http://nakloboucku.cz/uploaded/file/71643522679.pdf
    • http://rm-centr.ru/uploads/file/jowedanagufisiredatakozof.pdf
    • http://140.121.180.103/ckfinder/userfiles/files/bimoxalanamudaw.pdf
    • http://mindentudor.hu/userfiles/file/33285321092.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe3a6715f6---sukatiji.pdf
    • http://kalkulacka-hypo.cz/userfiles/files/50486635141.pdf
    • https://privatecambodiatour.com/userfiles/file/98800531078.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/1ffe46e2f5c7e859e4c1337a037a7e39/zomipudak.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=inshot+video+editor+for+pc
    • 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_off0000dba7.bin
91084b2a8ba38d99b6bc9a1e1bd48eced57b862169ac1c5dceeb5404807cd69c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA7 18780 bytes
font_01_sfnt_off00010cfc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFC 16792 bytes
font_02_sfnt_off00012513.bin
0fc0b2b703df0ba0003b418b7bf7b49f2d59a854c0a69e138cecb4db1426ba1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12513 10528 bytes