Malicious PDF — malware analysis report

Static analysis result for SHA-256 45298f70168d2009…

MALICIOUS

PDF

86.3 KB Created: 2021-07-08 03:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab9ccd24bed7b495bc2cf9d157b5c800 SHA-1: 5c9ec89fd069ed671c5f874e69a200b84d26a8d0 SHA-256: 45298f70168d20092ad743d437939c4c270184a5a439d6c89d87665eea5139c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://catamma.ru/uplcv?utm_term=utilitarianism+vs+kantianism+abortion
    • http://zaun-produzent.de/userfiles/file/tudugevivenajuwipu.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf4e307d76---82394864349.pdf
    • https://mashura.co/userfiles/files/35173119018.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c89668d90d4---zidumoxivevalebutoxatamov.pdf
    • http://whsclass1968.com/clients/f/f8/f849445bb2fb8f42e7c863050dc1ba38/File/puligezejed.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081dc6233fdb---murefujativabiwuwev.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/8cbea89197ba1462bad0d019538a48d5/nawagavo.pdf
    • http://kasystemofkarate.com/clients/861259/File/73064426380.pdf
    • http://www.deco-interieure.com/userfiles/file/76728576271.pdf
    • http://internationalnetworksolutions.net/files/51159927276.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8ad33e280---sudogusu.pdf
    • https://pima-alarms.net/slicice/file/widanop.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbff37fb3f---sowaxi.pdf
    • https://maxflowfans.com/userfiles/file/boloreru.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/548ffdc8de6656d5e99d7bd6ff632d7e/79988912514.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c19953e60c0---perusuropazunixipufa.pdf
    • http://trendymamy.pl/userfiles/file/50428919205.pdf
    • http://amuseonline.com/absite/userfiles/file/98388024467.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61e96b10c4---kimaxivef.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c950869db6d---karixekoriber.pdf
    • http://hit-air.pro/ckfinder/userfiles/files/ruvuwasovafimu.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9adf12471---84841473495.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/82d6477b9e296f15e06d418d5c3ce7b9/xevumenadevagutazuwudivo.pdf
    • 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_off0000effe.bin
d84230958f734de7fcfd006ab49ecffbece13bf2bb67a3ce3b4527715e70705d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 16932 bytes
font_01_sfnt_off00011c04.bin
62a30aa21ab402f3addf04ad52fa452b7b7fad2fff012217a434830b78f847dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C04 10440 bytes
font_02_sfnt_off000133b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133B0 16792 bytes