Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ed7d2fe10d9742…

MALICIOUS

PDF

72.9 KB Created: 2021-09-29 03:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 399fdefed5e1798981dad3119741f32d SHA-1: de5bca048b01a7004a5ecc826734ec009061364c SHA-256: e5ed7d2fe10d9742dad9d0a45abe51e07727e391a775dda3ceb55dde7aed6216
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm, indicating a likely attempt to redirect users to malicious content. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=computer+benefits+for+students PDF link annotation
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/tekelevazajijeda.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/vizozu.pdfIn PDF document text
    • http://getdol.com/page_data/file/73392161165.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614ef6d664904---53809656740.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/74935605661.pdfIn PDF document text
    • https://investkwik.com/userfiles/file/mumudibukesebem.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/tazowopibazefi.pdfIn PDF document text
    • https://ismart99.net/upload/files/98041740671.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/piribaloveximuz.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/pudunekenovupezekime.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20167047758.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/ladolazuzodozibido.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/72073760355.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/8387132236.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/90847380606.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/50883646340.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/60853198977.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/vijagozelopeselepisaxij.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109081123061740.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/25326382959.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/pasesuzezowigimuxumax.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/91785539808.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/38d04abd00225c62407dcdcec43671a9/49670309565.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/77069873473.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/39096861394.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_off0000b7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AD 17216 bytes
SHA-256: 4a149e903c7fc24058aa82ed6d69219fda209006e09a73c38f38afec349e8dd2
font_01_sfnt_off0000e387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE387 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9E 10724 bytes
SHA-256: 170e4cb4076d41963838f01912be522b9e312c6a85a45a0881d8dc6c2f0965a5

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