Malicious PDF — malware analysis report

Static analysis result for SHA-256 917c06dc1cc66176…

MALICIOUS

PDF

80.8 KB Created: 2021-08-29 20:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 898506b002dd1d4b75e3b1905785778a SHA-1: dad557d1ed6ba1046df9b98f4a0770a5a655d3b7 SHA-256: 917c06dc1cc6617600cf6e39baf9faa7e96877538d800fb717727f8937c54c03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=rogue+weapon+progression+classic PDF link annotation
    • https://at1-turbo-j3t.com/contents//files/97316219032.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/ditaganarudibaveralarat.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/86g2v071ckod6jgq59tirg84vp/rizituduzumavewewatolu.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/af36d82142e3b3453201ff255c62ee7d/polibupedogisunuwimev.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bcc8eeb69---81691390958.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/34106822806.pdfIn PDF document text
    • http://amblamy.ee/upload/file/gosugobariguvubitax.pdfIn PDF document text
    • http://cissi.it/userfiles/files/78872057569.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///52269424164.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/igur1v7n51af52s1ah9hki08tq/99057241685.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/96be64a0f0fe6bac598ba00236475d74/2293100969.pdfIn PDF document text
    • http://doreenindiatours.com/userfiles/file/jitamowivowave.pdfIn PDF document text
    • https://shinaltd.ru/images/file/25466073150.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/turojinovorula.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/24065399586.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/84a9d481e31f0c8d957949d332395e42/29249538673.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/161090814a591c---lexodakuzepamiwukod.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/40471264380.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/rilemifazawowimakadud.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/dr7chq6ca3eg2jdlbrj7cu3cmh/xuminolelepetofut.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/54017776286.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/62173468217.pdfIn PDF document text
    • http://digifast.cz/userfiles/jefosesomiketilitepiwolig.pdfIn 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://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_off0000d5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 17952 bytes
SHA-256: 99549f6c09e51413510523344dba319a529de5ae0d2649e6c700dae3e0ff857e
font_02_sfnt_off00011d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2E 10684 bytes
SHA-256: 3f51db08bcee3a54d2391a8233359f24f28afcd7543b099b8d9e6a262bee75b2

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