Malicious PDF — malware analysis report

Static analysis result for SHA-256 39adea2faa9ec7d1…

MALICIOUS

PDF

78.5 KB Created: 2021-07-23 01:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cf7b8d8b2c588f4491dea4814b0125b2 SHA-1: 9c14999911158d4b9b15fd996df8bd2eabcf088e SHA-256: 39adea2faa9ec7d127f0fcf5a6956edb440b088e66840f190700ff223fd664c2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to compromised websites hosting other PDF files. These linked PDFs are likely designed to further phish for information or deliver additional malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf91eee1938---29004596922.pdf In PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f539b38735f---14921619535.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/dijoxefepadudi.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/man4htprl6lt50bq9bajel5079/67553486819.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/rkcae9mf12vb78oc6l3k85u64m/15470522974.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/5f01hgo4ov5pitgl0qb4jnrbg1/19837535385.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/af9f4f0617e008524cfe6c52c539238c/bawunedojikikexogiril.pdfIn PDF document text
    • http://packturf.fr/files/lobupivavawarutuvujujo.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/621425463.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e14d82ca547---fegubul.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/zisizepubapururasas.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/97199860316.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/8hdhj0l27g3pp16n4tl69ilbu9/pafumoxopuz.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805231ef2f7---37596276108.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/19085921041.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dff18736e8b---53270558784.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16081d8bc80c72---51870991533.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5dcf2f0e509787bd7225a30b955fd8ec/84295413298.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/13l7o9s622pq6iia68ess2ebn7/46044866383.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/bozimoboso.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/wakefaferowoxanokavetar.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/132d86a7000a97c737748e950fcc93ba/zoduda.pdfIn PDF document text
    • http://dental1970.com/clients/5/52/52cfbc2c58cc98a1938bca6351e90795/File/xadoduwibab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=bach+15+inventions+pdfPDF 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_off0000cdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBF 10876 bytes
SHA-256: b9dafae3463c285964513dc5e85a3b1c651c0a2509f234746003349e50f758b0
font_01_sfnt_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 17036 bytes
SHA-256: 28f208289c8492d6fadfbd1b2fe0fff02bb8cda0c379e3741e0c444355870abe
font_02_sfnt_off0001130e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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