Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b5013a60bd73cf…

MALICIOUS

PDF

99.4 KB Created: 2021-08-13 19:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b817dd4036ee35389a7e2105b1532122 SHA-1: f50e456ad6354a096f9649a784935ea20892cae8 SHA-256: 46b5013a60bd73cf3b41e05de5956794f7e18dde75a8da14baca960173561c7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://smidgel.ru/uplcv?utm_term=dog+barking+in+dream+islamic+interpretation PDF link annotation
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160f10be68adc5---sijokuxelixipozeru.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ca712bff3b8a6d85d163ce641b27c007/80007060290.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160cf8c3c17bcd---24480877245.pdfIn PDF document text
    • http://cycling-software.com/files/file/mexemabedasusuvegizip.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076c0982273d---kolibegenadivomolovazo.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45ba3a8943---xeferaviwonufowoxigez.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/l1m37mbv9sp3l4nljo6ki4kjrg/59581892784.pdfIn PDF document text
    • https://roc.mn/uploads/files/zasuromifibekajinutage.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/15587237917.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fe30174ff---nologemesigofelo.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/7e1nluaqql7r1l5dv472db5ka6/48684715138.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/rijak.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1608443b2b82ec---8861960437.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/53037948387.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/01b01662bfcf00e381ffdade0b698180/nufesakibavimemosofanu.pdfIn PDF document text
    • https://xigmatek.com/upload/files/86987176994.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/53430165945.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160885262bfdeb---fogifasuwarifog.pdfIn PDF document text
    • http://geodez.com/pliki/file/mifabepimi.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078c001aad27---90303435374.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108e076c85b4---91661535446.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c0fca751e---87146478310.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/84657677936.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/35623941189.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_off0001204c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13863 11088 bytes
SHA-256: c529a88d467893c14fc5ce4d5a5049da62cc2498e3c6c50bd2195184b4076141
font_02_sfnt_off000151d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151D0 17256 bytes
SHA-256: e464a93804adb4961f247141179aef6ea2b32e01b72ba994d0a8f381a9858d0f

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