Malicious PDF — malware analysis report

Static analysis result for SHA-256 700be892cde5ae74…

MALICIOUS

PDF

81.8 KB Created: 2021-09-03 09:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 399fc0abd9263a5ecef690b78ab49400 SHA-1: 7b319e852703001b4c9e76c76f3bc4a873d3c622 SHA-256: 700be892cde5ae742a53e1f8ff91e03e9c39a8297559a79542a1c9cde78365d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classification and ClamAV detection as a phishing trojan. It contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates an attempt at tracking or SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://irlanc.ru/uplcv?utm_term=school+education+quality+index+2019+pdf PDF link annotation
    • http://studiorestagno.eu/userfiles/files/lamilewopixujadixomakilim.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608361c6e6ac1---12942615815.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838fc814577---zidujavo.pdfIn PDF document text
    • https://zold-kommando.hu/files/gerezixobimetofutevam.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/6451656903.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/15594157034.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/d6a756cebd16d097aee0e4c69a9b9608/gebumebu.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/9bc6d1644c3f4972a453ff62dfb38ffc/garilo.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/gisubuxepuxuwugow.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/70db8e9ccfd936029c218f94d83c1e2f/11490722392.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/zuribivulipituban.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/wosuxuxafowuderaxefivesu.pdfIn PDF document text
    • http://novafish.it/userfiles/files/gawojem.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/51808816198.pdfIn PDF document text
    • http://sartor.ru/upload/files/jedozejozebaxi.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47aa81646c---jubimigudulemuzatot.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16116d8289ae8b---98472103525.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/20121030919.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/pilexinanirolutej.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/5481514715.pdfIn PDF document text
    • https://flyags.com/editorResources/file///59819229227.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/jewetanipimumuz.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_off0000da1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1D 17468 bytes
SHA-256: 58b2d88f6e49be042066af4190aaa82912b7ff3462aec57595fe72fb4750b7b3
font_01_sfnt_off0001070a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F21 11448 bytes
SHA-256: cb89015ba971faccdc100a8d956e6157b6441bcca2a208e7b25922d1149b3f78

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