Malicious PDF — malware analysis report

Static analysis result for SHA-256 119d1fb75fef5dd4…

MALICIOUS

PDF

82.2 KB Created: 2021-09-09 12:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 932603ec04e7ada4e20a099c7dc5fa3e SHA-1: 7b5f04a6aff3ba1b4f17068d0c1249e59c1e7ba6 SHA-256: 119d1fb75fef5dd4b69adeb7e1ad832af9815ef44b1a9592b37805c84db15b5c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm hosted on various disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • 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 http://ildungrice.com/fileupload/fckeditor/file/14721505098.pdf In PDF document text
    • http://colantuono.it/userfiles/files/jawetupo.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/mikitoraletenu.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/fomadelimusi.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebd303605c---60748271472.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/vagilijijevisisarutezajo.pdfIn PDF document text
    • http://sooclose.eu/upload/File/muzadefevov.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/37336189836.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/88580775615.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/58690250133.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/51512067233.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/gisifofow.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/rapefapinibunuzijigasu.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/davenasewugomujalibez.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/xikekugujow.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/wobifexiduxomupek.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/zifafadogegixadovi.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/bapivebomuselowa.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/dedofideverovulujiseros.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/97ce109bc1da9e7d6cdc94664d0f7a7a.pdfIn PDF document text
    • https://tsolisp.com/files/file/27379459924.pdfIn PDF document text
    • http://c-six.it/userfiles/files/2348284937.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=android+camera+shutter+soundPDF 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_off0000dd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0E 10672 bytes
SHA-256: ed2d802b788459862e241af539777ab6dda3e04e90c1ba8126481db08e55592f
font_01_sfnt_off0000f55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6C 17824 bytes
SHA-256: 5dd1f20be6235da32ba5314c0286bb2623fe56f5d9b680a61913b4170efc88aa

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