Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aad9f002ae3acf1…

MALICIOUS

PDF

73.4 KB Created: 2021-09-05 21:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c29dc2ea10e86dfd223762df782f7c60 SHA-1: 79b788635c5e1dfaef746e713d576eab71387360 SHA-256: 3aad9f002ae3acf118ffb2d159bea50b2ae9a3be646e7543824f3af3bc1ece28
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS upload storage. The primary purpose appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 http://moto-bike.pl/userfiles/file/50225186107.pdf
    • http://holzbau-napetschnig.at/9304542675.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a289d71a667---96297067753.pdf
    • https://luminex.pl/upload/file/46624251266.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161159f4c54ccd---jaluzazinewora.pdf
    • http://cukiernia-waltar.pl/qcms/userfiles/file/66740555984.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ao7tdqsnof7gvn586t2oqq5bt8/zavowujexuvubezupovi.pdf
    • http://businessvaluationapp.com//fck_files/file/8781449976.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada977168e5---32728625681.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/tunedef.pdf
    • http://clingac.es/d/files/42509597520.pdf
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/37401093400.pdf
    • http://studiomarcheluzzo.it/userfiles/files/jatirale.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796e4050a23---26641188835.pdf
    • https://warungmimpishio2.com/contents//files/kejela.pdf
    • http://formel1vermietung.de/userfiles/file/54157786022.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/3dbe2a4ab5c6b6436fa638ef958c900c/momup.pdf
    • http://3bbb.fr/ckeditor/upload/files/54950502997.pdf
    • https://nutricount.cz/UserFiles/File/zinatejategexewajatare.pdf
    • https://penzionradvanice.cz/res/file/pojuxonubajilud.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160803e0649944---65797569337.pdf
    • http://popnmusic.fr/userfiles/file/9475324120.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/modokalopewodupixod.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=weight+loss+gym+program+pdf
    • 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_off0000bdaf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAF 16792 bytes
font_01_sfnt_off0000d5c6.bin
1ed4a1238227f328a8f349ec498d07c7bbf173b5d6516489369417342864ba5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C6 10948 bytes
font_02_sfnt_off0000eef2.bin
961c46240282c7315fbaf3b72ababaaead8b3180c87987997b00447e3a496273
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF2 16016 bytes