Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e5197aa5e873f8…

MALICIOUS

PDF

82.1 KB Created: 2021-10-08 19:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8fb4f70724316c4c16c970d7d79855c8 SHA-1: fed976d972d88f474ad8e618f1d709ca6400305f SHA-256: 07e5197aa5e873f853e711c773e46c508d12067ade2c80307f7f5460c6a30d2a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. It also features a large number of external URIs pointing to disposable hosting, suggesting a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=moral+of+the+story+sheet+music PDF link annotation
    • http://madmojo.com/fckupload/file/18803865231.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/12569128424.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/21187755593.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/58570504233.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161421b63d4514---tesumikuj.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/sepifazotimajotu.pdfIn PDF document text
    • http://ipllaser.in/uploads/xofikoraxaposajozuro.pdfIn PDF document text
    • http://elektro-galerie-hamburg.de/userfiles/file/76531077914.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/koxupewex.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/kogogusovukefi.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/mobub.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jiwugerapafubez.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/32643445539.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/topipezotufe.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/xawejovugorasoz.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210901130932617389greu5h.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/96961067832.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/dalanokudu.pdfIn PDF document text
    • https://roarmysecurity.ro/mm/file/fewaf.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/72852312825.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1615606dd8a614---jiremif.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_off0000db24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33B 10704 bytes
SHA-256: ed622069e5ae44f3b3a9127539882c5c1256304eea7e2c961b1e1e3dfadd7d38
font_02_sfnt_off00010bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 18432 bytes
SHA-256: b991c0b6fed208c032198cb15e585345b20592040488d5918a7f2412444244f8

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