Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3669008b67b9d17…

MALICIOUS

PDF

94.5 KB Created: 2021-07-30 17:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f4e6881568fdeaeaa30554580191ef2a SHA-1: 161bfa7dedabdb689c45ccb722f25c17de41bf19 SHA-256: f3669008b67b9d17e5f01faf645230032477055f65029d5df9ca9733dc8338d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malicious content or engaging in phishing activities. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/88b7faa44b1263cb8524cd2581a1e669/xevalimuvugogeta.pdf In PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/0eki336edorbcs2d3t4ddl6m43/26163571498.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8f461b8b87872930a0475ebf35f160c1/32733854172.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5ce058803---92315072006.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/rowosarodabedufubarinuzir.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/53294403680.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/49130219180.pdfIn PDF document text
    • http://camonetinternational.com/files/file/9145199871.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/78288809551.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc422a10a5---tunife.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/59588654371.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/34543250598.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/nizujinokiwubu.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b896b94969---refesisojogejaperapaken.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/md6o3aulcol094k0h8prri63b2/xipufofezo.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/xedif.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/mikazorutafewu.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606c761aa6a46---befifagumorusuk.pdfIn PDF document text
    • http://bhs76reunion.com/clients/e/e7/e717e6e8e39ea4daeda922698d41f3c9/File/nowamewebufolaguvoda.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/0lhuvh7cnrr1klmj2qjcfgunj9/38199201718.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/83df486beb28e521af5779b6042fd22a/fukubekelutidizenu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/95bb386cb9ceeaf50fc718dd9db0064d/46606949591.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/tejibezosovuwozonuxopoju.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/73998759605.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5101f0d68---lugigawakanuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=rca+universal+remote+control+setup+instructionsPDF 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_off00010dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFD 10744 bytes
SHA-256: d5a6be7f0cbdba6e548cb40b63c8f1da24c84f7da31ecf3cbbd0dcbaa89cc8cb
font_01_sfnt_off000126c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C1 17204 bytes
SHA-256: 31fe356544428a93d1b072d17c94f18bcdd58a044f8bc1b4851ff397eb66c3cb
font_02_sfnt_off00015399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15399 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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