Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9fe34a3e6b50df…

MALICIOUS

PDF

69.5 KB Created: 2021-09-26 15:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 69a0e394e211bb37c6d7bc0b3511595c SHA-1: 2cbbfa178458bb3b18be5a78b1b3f84ee7e0edeb SHA-256: 1f9fe34a3e6b50df44f3ba6cd5fa8fef73f1f7db8e6723439df881e5c22f782d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to suspicious domains, and one heuristic identifies it as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF_URI heuristic suggests potential JavaScript execution or redirection to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://chemonova.com/FCKeditor/file/kavis.pdf In PDF document text
    • http://studiodispirito.it/userfiles/file/wutejagu.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/79811099876.pdfIn PDF document text
    • https://partnermind.cz/images/files/kosenetukejozejebage.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/37448659807.pdfIn PDF document text
    • http://wdnederland.nl/file/40559693275.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/16814559540.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/xexutodukazexusafu.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/26887498824.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/716c69bb740965c531a9312393b7ba2c/sotevidomepej.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/jubogub.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/vosupizage.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210902070100.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16145f98c43b0c---26935104120.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/bovufebasevipatigulaw.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/vadumonosejuluru.pdfIn PDF document text
    • http://royalgroup.at/tmp/xezegux.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/40962782942.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/gijidupopuwebotiloganip.pdfIn PDF document text
    • https://businesslife.com/content/files/20572024768.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/volizodavabavoje.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/zuratofipivunigominiri.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/damevojiwuzapipulajulumim.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/maviwejefazogif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=javascript+summary+pdfPDF 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_off0000af91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A8 10652 bytes
SHA-256: 0fb4178a37c4935a75dab44d98f5831178fb76744801dc992965651491664c8a
font_02_sfnt_off0000e018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE018 16248 bytes
SHA-256: bde32b80d0024855786e1d0800850ed632e6fa298e2929b08eeacc29b613cdc2

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