Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0676fa52748ec8…

MALICIOUS

PDF

94.9 KB Created: 2021-07-16 04:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b6bd79ef7b494702e45c254b94570008 SHA-1: c162919f19f67589003088add3df49387e01bce3 SHA-256: ad0676fa52748ec84182a630efbc73e6d382c9d5381bf2d248af934966b6d15e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to obscure the true destination or leverage compromised infrastructure. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://webursitet.org/Files/file/zizazag.pdf In PDF document text
    • https://etimes.mn/uploads/files/pigedopirimedepinunukoz.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/silareverew.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1609d811e9fd5b---26328298179.pdfIn PDF document text
    • http://m2m2design.com/userfiles/73653053575.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xonavavexun.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/91322501190.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/nokikexeledumuwe.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9afd51a30---31378262561.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/teluxa.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7372b3e691---zurisitarusuduzuv.pdfIn PDF document text
    • http://candientuvibra.com/images/file/42498538563.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/0v9qge35oim87uk47humu37h85/46964591993.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ffdfca8bfac03f8c508b781a29a43f1a/piwafe.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/9d6d6a83c05e9a82bbc05e670807c04c/32193461265.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2576105cd---judoxududaf.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/2458965341.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/41699555538.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070525224062---39399189820.pdfIn PDF document text
    • https://coluer.ir/documents/file/70644907660.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c5d95e79a---74012305658.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2b81899cc---janowunoxixenet.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/gorogetovadajibuk.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/bogewogulawobilibakanuwam.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/zolozelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=can+you+go+uni+without+gcsePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 10696 bytes
SHA-256: 0eb2173bee52caf63e18303ff508607c07807b8f06da69a9d46a8ce2f1788d8c
font_01_sfnt_off00010f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9B 17036 bytes
SHA-256: 4c2ef4327aa242ca490d289578b4a841154cfe35de0da428dc795e5863ad1850
font_02_sfnt_off00012771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12771 17780 bytes
SHA-256: 551362f7bf7ae7b317d09d12fe1e28000d3381caaf7618cdb1950f42b52c658b
font_03_sfnt_off000155b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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