Malicious PDF — malware analysis report

Static analysis result for SHA-256 089dce7c761b9f06…

MALICIOUS

PDF

95.2 KB Created: 2021-06-29 06:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5d31a651559a3da140a504206de605ac SHA-1: 28675f080b3977e0059be9ace51c569b1b02acb6 SHA-256: 089dce7c761b9f06c12f9fd771bd953c9e91626757734e0d426cc0ad761e7dbb
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 it's likely a phishing or malware distribution lure. It functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://krisoc.ru/uplcv?utm_term=soleil+moon+frye+saved+by+the+bell PDF link annotation
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/d676d5dedbb7509d459c0e251185d699/27048300403.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/3358ad9974fd39075426bd24e6bd7d64/11715973360.pdfIn PDF document text
    • https://x-software.cz/data/file/fepimezima.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0354257f51---warefozejobelomokap.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5202a3b2a6---5044622142.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/15581203004.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606d14be350cb---fafawavagita.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/nnoq6eaj5s8kkjr070i83acfua/72105378947.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749665a073d---38678782012.pdfIn PDF document text
    • http://abc-tel.ru/data/File/fisedofejakugijobope.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/pj4gnki1av0pphbfp6jcuja0t1/guduzobowexe.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/sotumur.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/06cd052e0106ea96a88c193f37c22d3c/mijor.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210628040709.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be744dc834f---30935206426.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086e9dd78c14---rafifilibijitazuta.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609623151af10---suzenimibo.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16094537a89da8---57588792061.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086700c1123d---kilotefifu.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be07030bfca---97021740845.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/45601941095.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/fofabojasodifukuremuta.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/jodikil.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE5 18032 bytes
SHA-256: 58ea07a9284d42a698cd9b23b3d45c933381f02f14e5e5733450ad2274813da9
font_01_sfnt_off00013e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E19 11012 bytes
SHA-256: 6a16d3a941fae2df2cc710313dc424830c3024cb89a165dd42b69499ca62eb44
font_02_sfnt_off00015779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15779 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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