Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a1d764e38020c0…

MALICIOUS

PDF

87.8 KB Created: 2021-09-03 01:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1df8ab6df4a8f6659eca18666cb6c257 SHA-1: 998bb57d687db9d142cc25533b6cfda280cb1ba5 SHA-256: 34a1d764e38020c04f3d117bf149d3281b7cf4f600d21cd672eaa78c2410e150
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malware distribution lure. It contains numerous embedded URLs pointing to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or the delivery of a second-stage payload via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=mere+apologetics+alister+mcgrath+pdf PDF link annotation
    • http://giovanniseneca.eu/userfiles/files/mefuvujosamozavoludib.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/12603d9ef36d4d23cd85ba7594cabc57/javomulaxitedeboxuzipad.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/c8b1dc773ebc17b177f81a6a68967a76/60285855352.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/gscjknrgim8pl1m46sog6c41g9/33716395630.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/37847930107.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/pinerararugiva.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7aa218912---setitas.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/44250801810.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebc77b5bf2---25514388242.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d17b709e38---diwutebisoboroz.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/gapevafefebojexezizujod.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/82930803523.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/vufofotenaxasorapupazewo.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/vigerebimaruxonutokiza.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/jamezomusatiziwiz.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/buduvago.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a508de3cc---8732144234.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/7498365236.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093fed998936---77218935322.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/fisaropumubax.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/26630856956.pdfIn PDF document text
    • https://kawanmto.info/contents//files/76078321536.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/40742739969.pdfIn PDF document text
    • https://midasspa.com/ckfinder/userfiles/files/68155830824.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/76ed1e926a024df3838e2decc82671fb/91389789497.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_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 18024 bytes
SHA-256: d8bd4fac30d8e5f1fb8590e5f4932b41c31c99737f1fac65ea5cf65accaf3175
font_01_sfnt_off00012036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12036 10956 bytes
SHA-256: 409cd843286c7ddffdd6b0e198f07237c9baeed99779f62cb6e9f3e182679430
font_02_sfnt_off0001396c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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