Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fee6954c7cd6a05…

MALICIOUS

PDF

83.5 KB Created: 2021-07-22 21:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04c467ebeb77a6d537f3c0fd8796ba98 SHA-1: bc5e22022eae20c32c6e906398fe470978b2a5f5 SHA-256: 7fee6954c7cd6a058b9fb26bb49e638ec47dca8181a4d87c7983a04c1708a220
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The high number of links and the ML classifier's strong indication of maliciousness suggest this document is designed to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://train-in-japan.com/images/blog//file/juxivuzenaturewetudusezu.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/b2f5c254553d02c7ed6a131c604daf8d/vojuboxonodamipe.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54eb9f23f---15425378501.pdf
    • https://vansuloi.com/uploads/userfiles/file/bavuzoxonomujilinotugoro.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/089baabb5509fdc0a97b4b868c1c698d/4307922738.pdf
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/xotikavetewofunil.pdf
    • http://webursitet.org/Files/file/87966789855.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070cad15ef29---36066388789.pdf
    • https://ascinfratech.com/clientprojects/trading/file/15970550853.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/e5213ce4e9bba7c7cf76f785e312935e/miworezejaravolexa.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091d36387c04---99270394475.pdf
    • http://palazzodiaz.com/userfiles/files/reruxirorojopuxo.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd0e29b716---92371461908.pdf
    • http://chamdure.com/DATA/files/85186485930.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/5706d4cdff420796bcc1442e4daba3fc/12601061434.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/2pfv11v0g3fdnuijuoj1o8s21m/fuxopenatenutodab.pdf
    • http://gomientrung.vn/uploads/image/files/32967247998.pdf
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/2696093822.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/3cp4sukkt3cnrf0812bgamf6q6/65549560990.pdf
    • http://amadpich.com/userfiles/file/69951255535.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3385630986---fudizirim.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a2806fd53---19014405028.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96b6c79a4---waxagiwitorojufora.pdf
    • http://portalinmobiliario24.com/uploades/fckeditorfile/forobakokosewimuzasiduned.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b13a736787---pavizijuturun.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=we+can+be+heroes+original+song
    • 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_off0000e3b9.bin
e887ca09f344c8be77f473816f2e039b601f327f588a5857dc11260806dbe579
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 17080 bytes
font_01_sfnt_off00011062.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11062 16792 bytes
font_02_sfnt_off00012879.bin
51e19114eda5393723088ba33c7b5dc70f5ffbbf2743403a1b9f319b6165427a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12879 10544 bytes