Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e758b00fb14ce23…

MALICIOUS

PDF

89.9 KB Created: 2021-09-04 14:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a25774619eaf6adb44263c0c4771f0cb SHA-1: c2e7e1ddacae0b675a46318373327eb2df671081 SHA-256: 7e758b00fb14ce234f6c3165046488e04904d83ec09d762d75204ff1158d9237
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The presence of 'utm_term' parameters in some URLs indicates tracking for user engagement, common in phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=shipping+coordinator+job+description+pdf PDF link annotation
    • http://dachastyle.com/userfiles/file/rixetirixaketasimagivumu.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/najev.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/88936790451.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/zufozamavaravagu.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/xuwazufeginajemeze.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/81819231991.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/71682990518.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/42895771346.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/81539105907.pdfIn PDF document text
    • http://net-marketing.hu/images/files/40776215213.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202108162331139601.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611879ba7c22f---mikojemasu.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/b72c4fa727c2a01db196b6e2d42bea88/pajepomejuxewavuporot.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/navuraluralutonarokipam.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/gupagesaxa.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/tesakixa.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/mitepefogatipisip.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/pazuxa.pdfIn PDF document text
    • https://vleek.com/uploads/files/12105203989.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/a8ffaa8d828edbe547ea5bdd5ac2f841/jazinifepe.pdfIn PDF document text
    • http://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/tufoboz.pdfIn PDF document text
    • http://fruitvita.com/files/files/34531525726.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/36497937472.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/85279656717.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd546b3b73---23732076198.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_off0000f89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89E 11196 bytes
SHA-256: f73d190fa45253c7ffa485a1f13ebf8da7da459393631d02cb18286a58406291
font_01_sfnt_off0001124e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124E 18148 bytes
SHA-256: ceb2621e7ff60a5265b7d06618c0f2eb0dff0a1cc9a814bd06a2d40d84839c14
font_02_sfnt_off00014190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14190 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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