Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e29d0a15cd01cc9…

MALICIOUS

PDF

71.4 KB Created: 2021-09-06 17:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6939d9a4a257ae552a49502fc201a569 SHA-1: 5720bea267072c38c25cc63ded0080eff948acfd SHA-256: 4e29d0a15cd01cc9be1597ffdaa5396d7f1e04de20b007bb20825ee4dd4e821b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting domains. The primary purpose appears to be directing users to external, potentially malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://universalestetic.com/userfiles/file/51023753622.pdf In PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f3c6b58bc---bozagobono.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/93826303155.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/81549444727.pdfIn PDF document text
    • http://jrjohnsonfamilyreunion.com/clients/0/09/090f04f22b165063c0e57546eb93b169/File/61191900773.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///zajagirobezexubarifo.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/8dd84d1213b4612a9518ba98817895ea/dubelavopemevekeg.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c214deef9c9---gunejulixawuzegufab.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/45327607931.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/11893961318.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/s687l8noegp9vlhpsrpcd6bgf2/95040304005.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/76279737348.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/90900589708.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/18200970334.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/16209177627.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/motopafotabozikodul.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1a54351405---7538254437.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/xaxoxedudiwibitiran.pdfIn PDF document text
    • https://kristinanamaste.eu/files/nuzuvafitivinekeme.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/46051295535.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/raguzaz.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/pedijisugijabojiwevuroja.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/50559006719.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=crise+d%27angoisse+aigue+pdfPDF link annotation
    • 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_off0000b286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB286 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9D 10696 bytes
SHA-256: b09c756623c88ce2e44ee20bd6538dd47c6747982a72e66fc544463151302527
font_02_sfnt_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 17844 bytes
SHA-256: cbd8901645d3882b9cf31cdddd6cc5d57c047522d18b4083f4ce4794c4c5b1ef

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