Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6dc72502c39d8c…

MALICIOUS

PDF

72.1 KB Created: 2021-09-26 15:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 146eddd7f57005a9a79d7163f0a0db97 SHA-1: 2e998995ef22c9983f6201dd5c9144ebf365565b SHA-256: 3d6dc72502c39d8c1b7159b515891ddd5301bb1f32b11a071c2217b630f998ac
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external links, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=how+to+update+mobile+keyboard PDF link annotation
    • http://retrievers.su/ckfinder/userfiles/files/naxotekodutux.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/porulokojasipep.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/30208390445.pdfIn PDF document text
    • http://haki.vn/uploads/files/16965399834.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/98516688684.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/27089472814.pdfIn PDF document text
    • https://zagi.hr/files/43375933128.pdfIn PDF document text
    • https://hoalavender.net/upload/files/54519407913.pdfIn PDF document text
    • http://webminmax.com/userfiles/file/ziworemikilopubo.pdfIn PDF document text
    • http://www.zdravotechnika.com/ckfinder/userfiles/files/lonexudolarejizipoki.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/23812359611.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/lebaxodevekabirir.pdfIn PDF document text
    • http://studio70.eu/userfiles/files/85725948899.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/vosekemibij.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16140c5cad5961---fisoj.pdfIn PDF document text
    • http://schturman.ru/files/files/fifiwegime.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/89336596392.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/gexowasiwivirofavutaje.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/sulinuralofeg.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/jakevadujolazonep.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/rakunabav.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/wemezevetukabo.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/27969528811.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/zusulilo.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_off0000b508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB508 10804 bytes
SHA-256: 9cc24e4a597e37b208f5472e047083972b7f2d79e5f6a0367a1a44c393d4e37b
font_01_sfnt_off0000cdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CB 17596 bytes
SHA-256: 7fbc146430d0746918870362db9f7f9658cfca526228978b7f2092a4088b0a23

Open this report in the interactive analyzer, or submit your own file for analysis.