Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab349ccedf4f8c2…

MALICIOUS

PDF

80.2 KB Created: 2021-09-21 13:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fce85c35a277d8cfe92f56fbd9026589 SHA-1: 21d2c61037d98311b525dd92a08542fca52a0e7f SHA-256: fab349ccedf4f8c22d9a40de19ca49a11287836c56a7bc13fc36ce54889a7c11
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or are part of a link farm, suggesting it's designed to redirect users to potentially harmful content. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crewmak.ru/uplcv?utm_term=candy+crush+apk+hack+2020 PDF link annotation
    • https://hoangphatdanang.xetnghiemadndanang.com/uploads/image/files/mikifowefesokepadutumedu.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/97839109690.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/32419732449.pdfIn PDF document text
    • http://tulga.ru/editor/files/fetezuropeku.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/tekufitewefom.pdfIn PDF document text
    • https://www.iimranchi.ac.in/ckfinder/uploads/userfiles/files/54653706370.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/43807864013.pdfIn PDF document text
    • http://xsteelstock.com/d/files/wulivixapegep.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/65549530885.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/rikuwexopotimarasinawa.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/53112756896.pdfIn PDF document text
    • https://blueparadise.pl/userfiles/file/jenojil.pdfIn PDF document text
    • http://sinoorchids.com/image/file/nuzenobanol.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/3241155019.pdfIn PDF document text
    • http://storemisr.com/uploads/files/futokoritaki.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/woperunibuwix.pdfIn PDF document text
    • http://vce34.ru/attachments/file/vojozexagemufabelet.pdfIn PDF document text
    • http://marketingnews.fr/images/file/21080379977.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/56555797428.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/95742337626.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/rulux.pdfIn PDF document text
    • https://croatia-flyfishing.com/files/rezomer.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_off0000d508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 10704 bytes
SHA-256: 77823abc0abe2cb0feb70e04f75f82848f8853a4a43d2477b93467df3de9fbb0
font_01_sfnt_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 17540 bytes
SHA-256: 217017915b82f60e6d245e3de647f52e02680bedf8178771fd11578ecddd9f2c

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