Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74da7034cd2dd91…

MALICIOUS

PDF

78.6 KB Created: 2021-09-01 18:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 41a3b0891bc2d3f803bb9b63012102a3 SHA-1: 842879f05ba714c347d63771c1b56b3bc3967db3 SHA-256: a74da7034cd2dd91ac5ad1b40f2f68d3bc3f8c0eee0d7b2e5ca7360530b08f93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://inwebjor.ru/uplcv?utm_term=manic+and+mania PDF link annotation
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/nevoduligu.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/195af51fe93bd27cb2241907321f4848/fuwukosatetezis.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/17294746653.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/50305688158.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/799cac3dd582e16ee126f3e3ab0b5ab6/89071066128.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/70032438581.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/raxovidojesenixezo.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/70136259171.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/e659c4e2f2f8c5b7584d040f97d817c0/pebalinife.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/latubuteguvit.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/22878360797.pdfIn PDF document text
    • https://citytrafik.nu/images/file/wizeka.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2f465fd2d---podazewu.pdfIn PDF document text
    • https://unosms.us/userfiles/file/75009783665.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/kbh36bfmisabukpfggr8fo4ufq/4982193099.pdfIn PDF document text
    • https://coluer.ir/documents/file/rulaz.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/353a439e9a72c7af192853b293216096/79171464255.pdfIn PDF document text
    • http://timebymtm.com/upload/files/5206711132.pdfIn PDF document text
    • http://cutencuddlybreedables.com/_images/file/11797369861.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/vikovufuwavizimipu.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_off0000d4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E3 9860 bytes
SHA-256: 52c3d8cf86a5758c9f2dda47e350e8a76be6c26bebb591e1a53a4af79be13207
font_01_sfnt_off0000ea75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA75 16704 bytes
SHA-256: efdb83b40e48a0ab556bd4b511f254e3ae219d47a69a07b41a74309627e8cbe2
font_02_sfnt_off0001156e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1