Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b01996d2d6a046b…

MALICIOUS

PDF

77.7 KB Created: 2021-06-13 17:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b6322c0f339b80af16d7688569ea0d73 SHA-1: 1d7acd0591bbb029a404cc9ac98f2998ce819f3b SHA-256: 2b01996d2d6a046b137e741b8dbeea61caca20cee2141bba1079f7acd4f8700b
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 a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable domains, likely intended to lure users to malicious content or phishing pages. The document body is heavily obfuscated and appears to contain metadata rather than user-facing text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/uplcv?utm_term=ansul+autopulse+iq+301+manual PDF link annotation
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160846f8d16f05---xebekonanetuvu.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160ba792b37cc5---14897092772.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/80a21998784b4d36b4caf1f8497ae8f1/10551976957.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/5cc8c8f4ba1f148aaf527aa06ea17332/75763990554.pdfIn PDF document text
    • https://businesslife.com/content/file/papujum.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/1n4qefd551s0t3sv594idqfcp4/xapolozesanuri.pdfIn PDF document text
    • https://egf.tw/test2/images/file/putukaruwo.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/872pqhonj5fhvj3fah1i7gigd5/noguratofodofega.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/70944935665.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/ssfcnkk5mql1n8tmcqrsa7u6hm/pivigimutiludaf.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8723f85e34---tasotoxemopanafokivifep.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160702960bb92a---kukulamo.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/0e48c8b1c73e68359ab443deb77f73f7/dokigux.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/vesuvel.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/d4ec6pafc00f9bnbup8mtm0v9j/susikezi.pdfIn PDF document text
    • https://studiorampinelli.com/file/76931130555.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/8c15a033141f159f5ee4fb76b7dd6552/38354779639.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE68 5340 bytes
SHA-256: ddcf8963112707cbfea48bffd11a96ade7169167040e5ddc32ae5f88eeeb9747
font_01_sfnt_off0000f087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 6520 bytes
SHA-256: 8ebc3453b25e2debfec017f41d448c05e334696aeed64efebcf9d5addef741b5
font_02_sfnt_off000101cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CC 11760 bytes
SHA-256: 9ea2c3426efc1de1c920735c13e800cc09863f82e3fa4c374ae4c7d01182be21

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