Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0242285d10359ac…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 19:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3187cc367e6574224032be52f3378b8 SHA-1: 8234c278a6953289a3c4a716e5c26c60f8449e44 SHA-256: d0242285d10359ac70645b369f131d49c5a52eebf1992b70af3569e7fd473e55
174 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to other malicious sites or download further payloads. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document body contains sequences that mimic command execution, further supporting a malicious intent. ClamAV detection confirms this file is malicious, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://15449010.com/FileData/ckfinder/files/20210917_6977E1500D594DF3.pdf
    • http://bebaldebaran.eu/userfiles/files/57669793027.pdf
    • https://tssch.in/tssch/application/admin/uploads/file/68000592608.pdf
    • http://rallyteamwalraven.nl/file/49193567075.pdf
    • http://saltokisport.com/uploads/files/fanunewoxawoboxefojumasaw.pdf
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/41747215573.pdf
    • http://exdebt.bg/userfiles/file/34619866097.pdf
    • https://vietnam-pump.com/userfiles/file/movas.pdf
    • http://belovosushi.ru/files/fekisex.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pnqdl7gav0lcgatj4ar86aqb62/87557242295.pdf
    • http://www.companyforte.com/imagenes/editor/file/vijadifeb.pdf
    • https://www.rapn.ru/ckfinder/userfiles/files/87462510810.pdf
    • http://charmingcurls.se/upload/file/durunajuvogilebug.pdf
    • http://ylpcl.com/ckfinder/userfiles/files/fukus.pdf
    • http://szpk.hu/_user/file/29801533880.pdf
    • http://thinhhoanggia.vn/Images_upload/files/21587820932.pdf
    • http://timocomputer.cz/files/file/mibefogukijonibubofile.pdf
    • http://esenkardeslerinsaat.com/resimlerfiles/belun.pdf
    • http://brmxn.com/userfiles/file/20210906210939_a848ga.pdf
    • http://cgpreceptor.com/ckfinder/userfiles/files/72819769449.pdf
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/28434939007.pdf
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/86921688363.pdf
    • http://remont-m.com/userfiles/file/kenumidaxafezomivaso.pdf
    • http://okfilm.kr/userData/board/file/bumopu.pdf
    • http://ylpcl.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=new+south+indian+movies+2021
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC3 16792 bytes
font_01_sfnt_off0000f7d5.bin
83b8897a0b4baa37f4343fd3942763f472d36189d5d8342d7875fa45cf37a398		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 17144 bytes
font_02_sfnt_off00012404.bin
245c3922b637f07973448e26d930ea958248d3bdaa798e9d833e96dba3922c1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12404 10888 bytes

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