Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35c5a7613348e54…

MALICIOUS

PDF

88.6 KB Created: 2021-08-24 23:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7beb7714f6719fe2867636ef1efaa370 SHA-1: a826dc970e80b0b4f36aaa2a6195f1ee61e58329 SHA-256: e35c5a7613348e54f71f5bc35737e092ebd019400389c4346d41a35b1eb9a17b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, some pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=canon+600ex+rt+user+manual PDF link annotation
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0995016650---46134585295.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/7961408734.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/pomewaxarol.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/0a978b3c54ef8bd4e86bc1cd7dc9e71b/jubowaralujenazimepo.pdfIn PDF document text
    • https://guijek.com/userfiles/file/10689071696.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/40290221232.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/agu40htjn30fq1l8bjf8d0akl1/1162285055.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/ropaludukokepufepal.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/75966542137.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/4c7ae62d4af8d7e9e6b342c6b7138137/97821877047.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/tuzerusepupopowexote.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/e9ft9bs85g04soru3tkdrk0i58/vakunowipul.pdfIn PDF document text
    • https://cubic.is/userfiles/file/52401741516.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/qu49ors9blg79o7vuu2t2uhkn4/46946625755.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/nugomikizeno.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc76163ab2---robasetexumaniz.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/savoraladulamodam.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/14582902132.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/binojoliwesisesenew.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/23420105068.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/77435084433.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b305df1ba---sebuwapefoz.pdfIn PDF document text
    • http://usa-ex.com/fofekomaxivemidevuvu.pdfIn PDF document text
    • http://iacsglobal.iacsinfo.org/content/uploads/files/99018555903.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/72787505265.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_off0000f351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF351 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B68 10700 bytes
SHA-256: a921ff9a039d28f65e82fc980226dc5dbd2747ab50dda46bec04e0d2876291a2
font_02_sfnt_off00012416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12416 18712 bytes
SHA-256: 1a3324edc84f6aa543563e62b96cd86b3db3e99ac347fcfcb8942db6a392b30f

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