Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa7bb1889627ce1…

MALICIOUS

PDF

91.9 KB Created: 2021-06-26 01:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8c3c471d17d15ff2383fa6b5b226c2c5 SHA-1: 04d63d96fa817a67139b8536add3640b934c9c92 SHA-256: 7fa7bb1889627ce143bab19a77e52f2f555378a0aa6adb543378a77fd3f19c3a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions for accessing a password-protected archive, a common tactic to bypass security scanners. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=how+to+password+protect+pdf+mac PDF link annotation
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/i2ed50tofmbd772p62idvnemr0/rorizejerod.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b3868012729---5403435054.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/juvogokemizulasodekalina.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077eb24ba232---kivatirinosixajukexi.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d065ab84109---6134214800.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/28611379821.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/fb9e1207d05e9ccfd788e867a78f36be/vivadekugikifilexob.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/fqf6haqs9uh1c1kp5i06p9hho1/95520147511.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/10c6a450ead4b6ec4571b209daf9ac4f/2366028126.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/57898160058.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/rkfer1ua4ir88ltttibv8uj83v/fuxanitopi.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/todisuvemafefuxixilunevux.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/03a0a9a2d97273ceb5b267ec68d8c064/jejomenafudezi.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/banetemiraguvo.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/vokugufagiki.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/rimoxelefuwesoganinage.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/8c46e42aa800d0e061424ee85b6f37d8/xexarowikofagan.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5700e993d2---77306613681.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_off00010483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10483 17540 bytes
SHA-256: 5075a025b56cacff293d76e1164b51dff3de326b8fa58ad4ca0cd853f071dcbe
font_01_sfnt_off00013267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13267 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7E 10616 bytes
SHA-256: edd330583a77a781220c74442ece9e6f067d9a0e3d3399596177fd4e460dee95

Open this report in the interactive analyzer, or submit your own file for analysis.