Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e13be1cc0edceb…

MALICIOUS

PDF

96.7 KB Created: 2021-07-30 02:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 326fae288e04d8781fb99c1154a99422 SHA-1: 2f9191319e5f6c54a9d8c0f6e227d62619a7605f SHA-256: 18e13be1cc0edceb4f6f703a0e5dc0fdd445ecedca08d008ed15491d5483387b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to various websites, including compromised CMS uploads. The presence of these links suggests an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://terminal.hr/userfiles/file/mizanijigeronojalutuna.pdf In PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/b816703d51285f92e336331805448185/92515412576.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/rejenisijukumes.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e03ca2f11e---8471283995.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/wunideg.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3a8053317---xapazu.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/4b40e24b03663d8fdac6f91206b23bd5/zopanuduxak.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b17a9eeb4841b7675d9079f34a62a120/dawej.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/9299414825.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/62215816711.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/nudazajipogojiren.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/gujutejujugadirawutop.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/sazurifusurupikuridunoj.pdfIn PDF document text
    • https://amblamy.ee/upload/file/zinuwowogigajijafefufat.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/97257821249.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/lozusuxuvowawem.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/rikibusezukubobugakaseve.pdfIn PDF document text
    • http://www.moyekolodin.com/files/13456610710.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16079a8df2218b---ronebanonigujolazopaso.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/jedosofetusedipadevenuzap.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/5ur9vn7mtgghvckg6dfubpek7i/17793369933.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/10343512380.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/votibowekus.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/41610720275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=descargar+libro+de+mandalas+para+pintar+pdfPDF link annotation
    • 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_off000114e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E0 11104 bytes
SHA-256: e89cdbefe79dfd553827522928505cdc7c5205a3b4500466e77c68814d5a8fad
font_01_sfnt_off00012e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001466c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1466C 18236 bytes
SHA-256: 3b67ccc78de6c63799caa9af1d8a70e1d8f461a39b100c1c518013a3c8c71597

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