Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9ab6a399c482c5…

MALICIOUS

PDF

92.5 KB Created: 2021-09-17 12:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dfa1937a7bc29a4c82060e7341588881 SHA-1: 7ad5f876655be05822b812ce0fa05dacb1297ddd SHA-256: ed9ab6a399c482c56145a1af5b90ea92e158134e5747540a8ed425ec66d2dfab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous embedded URLs pointing to external domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of hosting many links on disposable domains, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://medvor.ru/uplcv?utm_term=the+quiet+watch+online PDF link annotation
    • http://bernendorf.ru/userfiles/file/duwatelutus.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/44167497818.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/48875014008.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/43503397703.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/nexusalutadajunogixanes.pdfIn PDF document text
    • http://abwrva.com/uploads/files/20163908435.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/5392562884.pdfIn PDF document text
    • http://355353.ru/userfiles/file/32583442347.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/58508494001.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/55614055433.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8dc4b8b02271b13abc4c405a7df85989/moxabefimidafod.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/sagimataxatazomizenud.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/guvusoxegajabokibabe.pdfIn PDF document text
    • http://sciattella.net/images/file/watazobuledoxof.pdfIn PDF document text
    • http://teakdeck.pl/files/file/80121880094.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/51121984494.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210906055149.pdfIn PDF document text
    • http://candientushinko.com/images/file/84370614138.pdfIn PDF document text
    • http://kezheng.net/Upload/file/sokovilupuvuposotil.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/jetuloxu.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/lelafomobunuzegitigun.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130a8975a53e---62983144773.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBE 10352 bytes
SHA-256: 0bfe51c3e69b63e793b4b4e583bc45b3fd376ea15ff77c7cecd4d2d15159f7a5
font_01_sfnt_off0001031b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031B 19124 bytes
SHA-256: 668a8e9d0985d04588eeeda0b05a9b114ba6ab864d29c38ff43ae3b5bce19964
font_02_sfnt_off00013561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13561 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
font_03_sfnt_off00014c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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