Malicious PDF — malware analysis report

Static analysis result for SHA-256 6412527448c93adf…

MALICIOUS

PDF

84.0 KB Created: 2021-09-11 11:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 96dd6a89849d4570bec56c39c509c9cf SHA-1: 57a636852595b83164f308e75d789eb673d08c95 SHA-256: 6412527448c93adf4e1b40add714f4c38a85c06c7800e57210336013f258bcd8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://queure.ru/uplcv?utm_term=how+to+connect+pc+and+android+phone PDF link annotation
    • http://zamdq.com/filespath/files/20210906003208.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/82945664620.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/vapodurogetobewu.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/6e551ec602623c025dd7474d646eb526/52991573236.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/xekused.pdfIn PDF document text
    • https://timminsrenovations.ca/file/Bat5WNKyReBxMLCA.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/lenudovavutago.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/33920143570.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/sovoroduwo.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/46dd4b99247b964aa9a2ae9b73831401/befowugakoboba.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/30615112911.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/kebaxujijisiziwexeza.pdfIn PDF document text
    • http://orel-trinity.ru/sites/default/files/file/sufodofotagax.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/zosodemaj.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/53075258304.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/kubarewuniwopanati.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-2/20210902051359170397.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/mukakepow.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/gonabavuzejoxekolojiji.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/80916602772.pdfIn PDF document text
    • http://diagcorlifescience.com/attachment/file/80680507273.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/bavibotoxulunulosexo.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/tuvomilabibibovotar.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 17620 bytes
SHA-256: 3a41d0d2a36e261f5aaa8fa86005934aa757581b99c9eb7c32fc5654c5ea466e
font_02_sfnt_off00012ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC1 10472 bytes
SHA-256: 55d061b3bede7ba428b4b7aeb506f7c0488a63d64eedfd6bbf8bb250b80468fb

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