Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11fae8aff263e37…

MALICIOUS

PDF

69.0 KB Created: 2021-09-27 01:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e0c737db34a5693e78396841a52542e2 SHA-1: dd6361d41198b64568ccaa933a20db6a55619c11 SHA-256: c11fae8aff263e37bd2f4572a905f52b1905d26270e7521ac2a9a4048f079624
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on potentially disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery through these links. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/77nbkbg546u2jk0puimvpv1asa/68572371113.pdf In PDF document text
    • https://coop-alternatives.fr/images/images/240897946.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/30872134028.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/zuzikew.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/25397944335.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/12291602924.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/vedazur.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/80814377542.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/33963801480.pdfIn PDF document text
    • http://castel.lu/userfiles/files/48344816342.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/29631751527.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/76628540871.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/vemif.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/xexofitetokowubuz.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/nufamukum.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/16931325805.pdfIn PDF document text
    • http://allier-genealogie.org/File:/jofib.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/vutag.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/58841445461.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/bl0f67irv6eqa3junnpmqqobkk/najiguluzarij.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/bawozegaguzor.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/gerokibepesanowazezet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=android+not+getting+text+from+iphonePDF link annotation
    • 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_off0000b15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB15D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96F 14824 bytes
SHA-256: 53d9749f95de5414b7cebbd41f607abcee9d0b5ecd95fffa2dff4e686e58e954
font_02_sfnt_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 10652 bytes
SHA-256: 964833de96fd8e4b193017334894240764a2c9113e7a3067679e17a168baf87c

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