Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d94cd8a20db9f85…

MALICIOUS

PDF

96.8 KB Created: 2021-08-11 06:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f653d755e0757704ca783e8525169753 SHA-1: 91232a8819f8bc61fe942d368615ed6eb196e2d0 SHA-256: 2d94cd8a20db9f85cc2a0001a097506b19647e25b29818c33031556ffce77160
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the conclusion that the document is designed to trick the user into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=how+to+get+a+command+block+in+minecraft+ps4+edition+no+mods PDF link annotation
    • http://parcroyale.hk/userfiles/14078119647.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/36823046134.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/42369126875.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6116f9f8b0---xokiwajuvufezasesi.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/p28fs33cqejh8dfqf595otq0ng/78091453163.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/3c96b2ccf4f13e31ca43a85a4d579361/11413909301.pdfIn PDF document text
    • http://jucal.es/images/file/vamelefufi.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/puduxef.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/174143ed090c6e55a0cadd0b5e3cbcfc/buzegejekewe.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bf88a7c079e---17374774553.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdeb25cbdd---26692494485.pdfIn PDF document text
    • http://yuha.be/_files/file/xekamubaw.pdfIn PDF document text
    • http://1parareunion-club.com/clients/4/48/482fc251494624b09083a87f212a12d7/File/fetuxemotilukonuvesu.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/birunexasavejil.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f79951033---menefutimoluxoxovenasu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd2109199f---51072966646.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c0291414d---dagojurop.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/v4170mfsp08e3257jhd533pb9l/musanijiluxitilikutibobat.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160969700919cb---badupujumupabovuwuzodeser.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/puzisotaxeladufibuz.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc207409cdd---72528987391.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210716162450_e7e32e.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607331bde4288---bulejumamuvegoto.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/rasedumovejodavukome.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/fixidowudufurosogafupipa.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_off00010e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E14 19700 bytes
SHA-256: a256bf5a9f2b091b4f777e304911391258fa9decaba5b572a993b5ff704d7238
font_01_sfnt_off00013faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000157c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157C1 11352 bytes
SHA-256: 505e5b79e8b5dd3c06f70d442cbda3b5e06c6b3046ec9bce32c3613025c688b6

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