Malicious PDF — malware analysis report

Static analysis result for SHA-256 00eed6331714717e…

MALICIOUS

PDF

69.3 KB Created: 2021-09-18 13:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 347dbd6197ce5df3c556709762f51119 SHA-1: c3227bef2d3e82a9cbd5b9bdaa60c014319768e4 SHA-256: 00eed6331714717ec6bfb9fc9ea270e91c2c24336e0ddb2fb07fc56a034a840f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and link farm structure are designed to lure users to external 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://archism.ru/uplcv?utm_term=h96+max+rk3318+firmware+android+10
    • http://kuryakyn.ru/userfiles/file/12095019871.pdf
    • https://lsv-wittlage.de/ckfinder/userfiles/files/fimipizavajariwotezixeb.pdf
    • https://literie-depot.fr/UserFiles/file/fuzomukenevowipomonejam.pdf
    • http://sinching.com/uploadpic/files/202109161106466767.pdf
    • http://eperon-kochersberg.com/img_db/84844482113.pdf
    • http://thewellmanteam.com/userfiles/files/pejefabazoxodonatadawuz.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/8b0b4bc45764a1add7f8f3931503e685/pobotikunedidopar.pdf
    • https://fond.ru/userfiles/file/fanixewut.pdf
    • http://profesniprukaz.cz/ckfinder/userfiles/files/xusavitudulubol.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b877c72c1---11087279586.pdf
    • http://salukool.ee/upload/userfiles/file/mawubivijav.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b26b79215a---59809593045.pdf
    • http://udmvdpo.ru/images/files/4330192513.pdf
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/94552903080.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/161404a627579a---bufuzax.pdf
    • http://3gr-group.com/ci/userfiles/files/dimigoleponabumakekoka.pdf
    • http://inwallendorf.de/userfiles/file/jireb.pdf
    • http://parzenica-bialka.pl/userfiles/files/lubivixisowijovapizon.pdf
    • https://at-studio.tw/app/webroot/userfiles/files/20210910_104724.pdf
    • https://red-adlay.com/upload/files/20125826271.pdf
    • http://fqcycpa.com/jingkelun/userfiles/files/20210915211151.pdf
    • https://turkuazhost.com/calisma2/files/uploads/povekiwagik.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_off0000ae97.bin
3d96d513cf7dfbebdbfafd2b53c109f44ff39440745f21aafa08c3e9e25ef8f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE97 15052 bytes
font_01_sfnt_off0000d4c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C1 16792 bytes
font_02_sfnt_off0000ecd8.bin
6e55056fe6734c0a18ba9149ee81a071f38214996dc84ba3277619663e0e2597		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 11364 bytes

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