Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca41079e129e81c…

MALICIOUS

PDF

81.2 KB Created: 2021-09-18 17:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee814dffffa38a16d84f1c8085611fea SHA-1: 22f87e6ace40ec8af389d33a6e1fa921bf33ca5d SHA-256: 2ca41079e129e81cceb64d14f019bddc387eb5779a41156c634b998b1810bcf1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, presenting numerous distinct hosts and URLs, likely to obscure the true malicious destination. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://autoroman-service.ro/imagini_ws/91173395273.pdf
    • http://hoanggiaphatstone.com/upload/files/72785769158.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16142427bd7e85---5635042345.pdf
    • https://inmaabiladi.com/userfiles/files/18355093362.pdf
    • http://gruppocaminiti.it/userfiles/files/masonuzuvudafowezu.pdf
    • http://galaxyjewel.cn/uploadfile/files/getesijokikakon.pdf
    • https://inprovit.com/ckfinder/userfiles/files/lagivawepeperezup.pdf
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/2396466781.pdf
    • http://sithome.com/upfiles/file/20210905034835.pdf
    • http://qcfloor.com/userfiles/file/83709564429.pdf
    • http://ipllaser.in/uploads/98022613484.pdf
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/35415565827.pdf
    • http://daiwavn.com/uploads/image/files/sijagimosoxobowozom.pdf
    • http://pcwenhua.com/uploadimg/file/1631163036459858261.pdf
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/sotenubiripusaxuzogakimol.pdf
    • http://cck-brno.cz/ckfinder/userfiles/files/68052690769.pdf
    • https://renebeumer.nl/userfiles/file/nebobixibeganij.pdf
    • http://ingfrimale.com/userfiles/files/7922523220.pdf
    • http://inarchengineering.it/userfiles/files/65909746789.pdf
    • http://hvpeds.com/upload/contents/file/49105678157.pdf
    • https://lifecareproduct.in/ckfinder/userfiles/files/42293759387.pdf
    • http://fernandopelosini.it/userfiles/files/54992419983.pdf
    • http://www.dkmodels.net/ckfinder/userfiles/files/vokawab.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=god+of+war+1+ppsspp+iso+download
    • 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_off0000d893.bin
4b5c1421e21bf75bdf48c945bc38778b75059fe34a21aa3d449dbf5f4a8f0337		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD893 10436 bytes
font_01_sfnt_off0000f066.bin
d346b56efc2527fd256563c98cf9b99003c4a7e304e9264b5f01a6df6b99ff03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 17908 bytes
font_02_sfnt_off00011e9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9D 16792 bytes

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