Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba20cb6b59a1df7…

MALICIOUS

PDF

82.6 KB Created: 2021-09-16 19:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b554129d6a1b93ad54f805aa54349769 SHA-1: a17f2a93cd21c91f17638747b74bed9834511c79 SHA-256: 6ba20cb6b59a1df7cb92d8eecbe06a884aa25018813fb047958079b0102b8d56
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many of which are hosted on disposable domains, suggesting a link farm or distribution point for malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://medvor.ru/uplcv?utm_term=mp4+juice+download+apk PDF link annotation
    • https://nacionalequipamentos.com/ckeditor/uploads/files/6154460524.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/nojotimonexez.pdfIn PDF document text
    • http://signfabapp.com/ckfinder/userfiles/files/lejofem.pdfIn PDF document text
    • http://markone-tools.com/upload/files/gapefovidasasolowapexi.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/gevesepazuwu.pdfIn PDF document text
    • https://smshealthcareservices.com/ckfinder/userfiles/files/88585634217.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161313a567a669---11738394574.pdfIn PDF document text
    • http://lishasurgical.in/ckeditor/ckfinder/userfiles/files/92577002734.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/povinomobozidekinesom.pdfIn PDF document text
    • https://papiratisk.cz/soubory/fotanuvetewapofok.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/16044200372.pdfIn PDF document text
    • http://aucontecnologia.com/userfiles/files/pejarekarojodajavar.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109101517327619.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210913153632_ik69io.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/wobinaxevulupok.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/79036200447.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/2481595180.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/widuj.pdfIn PDF document text
    • http://simoncaulkin.com/images/wetupaguzoraxakefapizepa.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/48937151932.pdfIn PDF document text
    • https://vpmemorial.net/images/file/8872010845.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/sonajuwuxikifujinejuniv.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/tosugobekado.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/rebonogigadamam.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_off0000dbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCA 10620 bytes
SHA-256: 98e192508a558c7819bb9c2e8c167de5a043f6c716655058d8183c6b42589638
font_01_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 18284 bytes
SHA-256: 13f0c8b416ddbdb6c4515d2fad7135951dc67a937f1a6983bb5fb05b9ee84ec8
font_02_sfnt_off00012365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12365 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1