Malicious PDF — malware analysis report

Static analysis result for SHA-256 782f560c235ef83e…

MALICIOUS

PDF

92.1 KB Created: 2021-07-02 11:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6abeb7d2e3f3bf422959e5bfc058fb48 SHA-1: 80a57c0d71cc2220e5faa8e0ca018e97c6b0eb92 SHA-256: 782f560c235ef83e0c55fe962771aaf1c8790652435f5673cb02d3108dab420e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress sites, likely intended to redirect users to phishing or malware distribution pages. No scripts were extracted, but the structure suggests it's designed to exploit PDF vulnerabilities or trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crewmak.ru/uplcv?utm_term=chaplet+to+the+precious+blood PDF link annotation
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/661cb58b8f0dec37f38fc0772b373095/nivizafobezikenajobisu.pdfIn PDF document text
    • http://18554080.com/userfiles/file/zonenige.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/i160le1laqam72vklmd6g8s45g/60038008697.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/pabodesaxenufivolepumaku.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95998642629.pdfIn PDF document text
    • http://sun-eko.eu/files/file/32221118063.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/23290666681.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/33208b7a84749678ea88b5ba5cfee714/zeled.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fb3401868---20229429329.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/6b1e99eaa533ebeb3fbaccd989c1aad9/52794447877.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210613145939502101rdrjk.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/01cc02a1505f035ec62a6209bfcc0f29/9798166410.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/39gahoam3o05to5to0r9f70cd4/74484985726.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160b4566e3bd13---ligavumatexuxatogegivaju.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7dq0cgktpe9res3s72cs04ve8l/jiwiwi.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748951206d9---42478366797.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/silexagadakapa.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/jf8sej2io5mpnjegh0uk2a8ou8/kedizipojuvevenuwakikupe.pdfIn PDF document text
    • http://remobudostol.pl/pliki/kewezalifejixobetezuvuxof.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/68a704c7a0064f956ffd0cd4fb7e1ded/tulusated.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/i5c117gq52gs4u585jhiviak7m/jexutolusefulu.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce20e3610f---54631128146.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cf18b7425---begorezewejuzikugadi.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/31750338216.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/ad3d8842339761370444722504c47854/fosudunomok.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_off00010593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10593 16788 bytes
SHA-256: 815a114d238751b242f6f78d90817e1c52eb8bd4fd63fa439f9925cc3354451c
font_01_sfnt_off000130ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14903 10776 bytes
SHA-256: f45dfc60d5efac820854e198200caca92237958b1bb1c21c027d30ec2d060504