Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7001953a91e0f26…

MALICIOUS

PDF

87.4 KB Created: 2021-09-05 19:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 666722142d27a904ad97acb8b5fd0f3f SHA-1: 61ec0513eb04e83fe7bf47bb0a6474aa658c50e0 SHA-256: e7001953a91e0f26cf95ed5857ee26aee1c631aa9b8315ec23deff1d56459078
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The file contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to host and distribute malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this file is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161255c1c24c24---lojevodafukabe.pdf In PDF document text
    • https://renesens21.com/ressources/upload/files/xewajafadavi.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c03e516511---fepizibixekiduk.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ec0ba56a6---96444034539.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/lajadeduwufokexinu.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/wagemibubitowapolazi.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/kirabagaresujufolowom.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/df03e59f8ba54c97212dee713831df8e/pajofoparowin.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/pelejigakisev.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608029cab5162---jolesuzanoxuwi.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/98648566674.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a625db011d6---86191258803.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/jemalamogerow.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/minidimore.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/638ac2b801e2fbf6b68c7b2742686d20/62380113512.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad06e597cee---forazeraxane.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16090ee277d1b0---4986337022.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/89732120757.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/fobineb.pdfIn PDF document text
    • http://thecoferfamily.com/clients/7/78/7892d776c92a08c80f86ebc6236678d2/File/jawuwiwilafenatokitape.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a9662088eab---14074907584.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607375134c2d8---25527449968.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/51761392062.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b641b9892---52947141659.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=bsp+tap+drill+size+chart+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_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 18572 bytes
SHA-256: 258043402907ad388a35e8ea0ba7e9204ef9b7afcabaeffaa2690aa048741849
font_01_sfnt_off00011f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AB 10608 bytes
SHA-256: 9a6715c050225350ec9eba69e23425714edd48c5508222731714929e190636f9

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