Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63f66e22bf2faac…

MALICIOUS

PDF

83.4 KB Created: 2021-09-01 05:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a74a7bdbfa0e73732509102140bceece SHA-1: ca911c9e5b02647a13ea0e0ee966ffd58497d120 SHA-256: d63f66e22bf2faacd15c529cb48f55554ea17dc07bbb316a573c4763d6ff12e1
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The primary function appears to be directing users to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://infrive.ru/uplcv?utm_term=thank+you+for+arguing+jay+heinrichs+pdf PDF link annotation
    • http://ylpcl.com/ckfinder/userfiles/files/70660311086.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/35291845177.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/trnflnhslt797q53q97jfmg08q/semejawokuwajuzepi.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c324bd52917---jajurosiluvinudolasatu.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611fcc87d24b9---genozovivagomomozanaka.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/foxegugivi.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/86581059840.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3b6de8d1d---42434530017.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/q6q9nk5j1kup5d5n57hk063hn2/6759024678.pdfIn PDF document text
    • http://bluiettgriffinwilliams.org/clients/2/2a/2accc941c041fffeac9751862bb8fe41/File/pivedurowajutarowewutijo.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759ab631426---mazixefobuwuburivilimixi.pdfIn PDF document text
    • http://dhf-china.com/d/files/74443206835.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/79449568072.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/uft5j5k36nc5fplj0l9dp46etk/wajujigeweg.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/f195a21d38767384f53247cbe7e23734/60119496733.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/3a0805f7c6dc83d4a6b4ecfab0156604/12047751033.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607711c63f8f3---4330466658.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16080a31623d38---lukadaxoburopa.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/20566232985.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/nuzufajifedovelisizofofev.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/45876514194.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/85039308238.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/lg8l532uued117q3cat2jsh0f5/wasapakaxosaviwo.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608199c78a3f5---12565655175.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/30136047289.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a983b22180d---xemufagafufabud.pdfIn PDF document text
    • 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_off0000de74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE74 18208 bytes
SHA-256: 694b98dbd72b7b6000021725a49223d155afbb65d73f23929f46dbe234d2abf0
font_01_sfnt_off00010de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE2 11156 bytes
SHA-256: a2dc99beab786e1ceb84ec604b46ba073700cc3175d075ebe22ba18b7ee4940f
font_02_sfnt_off000127af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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