Malicious PDF — malware analysis report

Static analysis result for SHA-256 f493ae665edc82a2…

MALICIOUS

PDF

85.0 KB Created: 2021-07-08 07:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bebed0073e843177b2878e4be486f8dc SHA-1: 8fac501769093038fd17814c05a31b0af9fc7f85 SHA-256: f493ae665edc82a2f6e207f097b59f1d4b6244bc748fae67f5263e4145bf79c4
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 a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, suggesting it's used to distribute phishing content or further malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support its role in a coordinated malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0accbc023bb95ff85cd8b9398aa05cf6/tukimobegalizijilafujaw.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/r2baevj6970so0qtk3vohfnbsl/vidixaviximob.pdf
    • http://supermarketdv.ru/files/file/24077010900.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/927cc9d632c44f31a3f1a348b4460ea7/84351599719.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/3d4132ca839a818dca224bd527c044de/5777051776.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f7afe39e4---lekaxezow.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/3ce11bb5ffb12c88c90b7f17b29b4da7/5128328750.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160afab1840ae0---78857248374.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079246a94dfe---wabugozejufodoro.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/0f227abc93c150a6644cd3e1ee0b2e9a/11908107944.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160e3d12a873f1---bakapivapo.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b898e5021b2---lumelivajomifuv.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/8d0cc31ca7f80eee152b39576a6df385/merutej.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c24c92d6682---18014641902.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ed5370c25---6973040882.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/461e5d5d689688880d55513b925fd6c8/fedokotagudovidudej.pdf
    • https://zlatartopalovic.rs//files/siligemelezodido.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/bs19v4cfas6bs9s9v9mhrvtof0/3901923275.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6d54f455767691d2912894b53141b09d/28237814523.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/48b3e0acdb17933677fde2efd21580b1/zuzevolumakovot.pdf
    • http://chingyi.tw/userfiles/files/zawolad.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d77213d35ce---bafebeselarofujezifomu.pdf
    • https://groupunsur1.com/contents//files/90041057325.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=sat+test+10+answers
    • 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_off0000e540.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE540 16792 bytes
font_01_sfnt_off0000fd52.bin
40b7d6c60457c53e4ebad9c3a2b6af7d2e996a6b25620e4e0cdf024b226bc4ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 18920 bytes
font_02_sfnt_off00012e92.bin
637b984367dacb2c86cef7da57ef22c33aa85c5038b5e7433ca23c53831afff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E92 10180 bytes