Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80060928ecd9f7d…

MALICIOUS

PDF

92.8 KB Created: 2021-07-23 00:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b2e7aa90697924129ef963e354ed07d8 SHA-1: 9f0ac033efa262fd9021766148bfa8342c11a873 SHA-256: d80060928ecd9f7d419629348ff3c5ebaee83ec7a09c96e79e629d51530a9d80
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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.
  • 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://vimbark.sk/editor_uploads/files/54343624772.pdf In PDF document text
    • http://gaziogluenerji.com/images_upload/files/88171984365.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/9ier8k61r26daip5ja9e6d2bib/88314562687.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/senoroje.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/52743774797.pdfIn PDF document text
    • http://elm3rad.com/file/44375915578.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/90989587600.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818d29bb8b8---fofizezoxuxizeku.pdfPDF link annotation
    • https://tezerwatch.com/file/upload/files/06-15-12-01-19-91.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/pd9onr4jm75uc50ru5msuh47t0/pegozagemelipujad.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/dunav.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/newekizulov.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/86099830551.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db00bdc53c---nevejuvinulawab.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/35853112572.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/nanumizix.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/0b6bfee95bc45058fdf69d4a4ee59726/kititijesitikogimotupukit.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/b44d7m9hibencb9nelebi84nm2/25533806503.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/sezutalaradul.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fafvp3q9dq4u4cnp0im97tq05/kugux.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/87091573914.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/41962975044.pdfIn PDF document text
    • http://fygl.net/uploads/file/110132413818.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/viketijefusizikife.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/8693ded3119518f38fd1f93310b9f5f1/42082159180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=chemistry+class+12+chapter+1+notes+pdf+downloadPDF 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_off000104ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AE 11288 bytes
SHA-256: 95d4be3487ab15a06fbdbe697a60d08631006be1c73da85a07374800b0c6c1c1
font_01_sfnt_off00011f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2E 17412 bytes
SHA-256: c099a1757777e2d7dde88a1d03d2ce1996cd10cbfa2d3aa7c1ccfcee3b520a30
font_02_sfnt_off00014c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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