Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4415048f779d8d5…

MALICIOUS

PDF

78.1 KB Created: 2021-09-17 05:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5a90c178ef0ed03a4e95f02e417b7198 SHA-1: 0e3d0a84f7147730268516db99490444a2155550 SHA-256: f4415048f779d8d5f9ceb5d4e7b1c8b9438e0b3b262fde5d3ab3eb4c9703dc1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' in one URL indicates a potential phishing lure related to search terms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=technical+analysis+by+john+murphy+pdf+free+download PDF link annotation
    • http://dataction.org/demo/dataction/media/belunezixaxovunogabowasid.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/21924463394.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/qn39hqp8751d114tre2cjc85t1/kekobe.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/58542380774.pdfIn PDF document text
    • http://ruihuitax.com/files/file/86978600989.pdfIn PDF document text
    • https://andhimazhai.com/images/files/tetanugonanapuje.pdfIn PDF document text
    • https://dyaa.club/uploads/file/fedegiluvezed.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/surek.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/90511623345.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134888a5d74f---zefizovatuturat.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613715b0a3940---mewumibufatugerawe.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16143c5208dcba---mezepabafadokumimesup.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/30378165130.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/pobej.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/keserulopusuwofuxi.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161355673744b9---xiduxadolisob.pdfIn PDF document text
    • https://negaratoto.com/contents/files/xexotev.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/voxujarila.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136819b06071---56349416547.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/12575410024.pdfIn PDF document text
    • http://marketingnews.fr/images/file/gepejasomapegowipawi.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c226e98c1b---woboture.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/72895170783.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/vaferufivuzevan.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_off0000c911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC911 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE123 17988 bytes
SHA-256: 0411e31db901a84b7d8fd4cd7c1fe424e7f10fc86d104154a851db4cdf759f77
font_02_sfnt_off00010fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE9 11320 bytes
SHA-256: 7b72fe51cdd664f8711ee45c49833a5a843702559a2e4bd263cc0d286905af26

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