Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfe75fac000f950…

MALICIOUS

PDF

74.0 KB Created: 2021-09-20 23:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f6325222389aacec5e1e17a90b88a55 SHA-1: 4a841674322cbac0a0883328d7c0db1256675a4b SHA-256: abfe75fac000f9507584dfe42f937b8cfbc5e18e77e66e6c984ec434f5ae51ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to external sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of external URIs and the link farm heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://nomylo.ru/uplcv?utm_term=things+that+start+with+r+around+the+house PDF link annotation
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/57305226760.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/bogedelu.pdfIn PDF document text
    • http://szerecsen.hu/editor_up/1296852754.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/wunuwelogalud.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/85521099664.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/rajezigivi.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/jigutotezomovekititaguxet.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139fabeacd54---weruwamopinesitizubosok.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/guzidunolomumex.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/47665828248.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/jupubosu.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/27628313231.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/lipus.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/84465147700.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/sexuwuj.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/muxebegumezewukowo.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/41293592422.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/xanaxim.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/39067726577.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/suk2ht6316a2kpk9ok33t0sj40/40905599473.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/69185291625.pdfIn PDF document text
    • https://vietcuongcorp.com/uploads/news/files/mugip.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_off0000be24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE24 10632 bytes
SHA-256: be6eb5b2424de26c63c071c39dbbf8229fbfd4b520c4e5058e1c3892d3ebac35
font_01_sfnt_off0000d649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD649 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 17192 bytes
SHA-256: dcbac78e4be5b9bbe448b588c77299af7255e7d97afabc34d8701565aec15179

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