Malicious PDF — malware analysis report

Static analysis result for SHA-256 146e7f833dc938ff…

MALICIOUS

PDF

74.9 KB Created: 2021-08-22 01:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cf62b1bde9def1a8037a27306b2bb983 SHA-1: 346454e2a194626f4ce1e99ef924962479d7b8cd SHA-256: 146e7f833dc938ffed8b231844eedff7b9054922b170b0808ff53d6ad64ceaf2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary attack pattern involves directing users to these external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://apotekatia.ba/fajlovi/30624741964.pdf In PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/dae3807d2de447de9f03fcb2a89915b7/madonusob.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/prc5qe1t9fmlq1901edmf2srir/88188859085.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/wamubiwunebokase.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/0325130cba19474043bb9a027370128c/retibamis.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/eb8661d59d71aadfa352daaa6c996d24/pomoperere.pdfIn PDF document text
    • http://tulsamemorialclass1969.com/clients/8/8b/8b8b36ecbaf17f244e47af75a29dfbe2/File/sunibaja.pdfIn PDF document text
    • http://phucatgarment.com.vn/ckfinder/userfiles/files/vuvevitizoraxi.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16076b65425bf1---foxasuvanodapaxebasabiru.pdfIn PDF document text
    • http://friulanapanini.com/images/file/sedamitogomudekabifu.pdfIn PDF document text
    • https://topaldanang.vn/uploads/image/files/zetimonositoluranetesiw.pdfIn PDF document text
    • http://lblussana.it/images/file/gebevupirurotiwad.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/podaxozegovu.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071515f8af68---rarodamezozujatutewebopof.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079793de90b8---60907758170.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a7027134f5---gegodetubemeweda.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/kj31212sk8scf0sh3ta8f6nu46/wigalotifutiga.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/35564917880.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/pifafupati.pdfIn PDF document text
    • https://medtek.vn/storage/file/texufepozibaruta.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/jmve7cqaeugqsookk5liliq1dh/82739168508.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/1e8d233e554219eab779e36876ec467c/15693949456.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=alcatel+lucent+6450+password+resetPDF 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_off0000bee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE5 11084 bytes
SHA-256: 2e8f7a9ddeea60a6095386caba60682dc6c944c9e374460cf97645021f7ae24f
font_01_sfnt_off0000d912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD912 16672 bytes
SHA-256: 3f206a5b8eb4ec94be66e53fce2433ce95ac9f7e5e532059714641b266c4f507
font_02_sfnt_off0001043f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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