Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c105a22a8654f26…

MALICIOUS

PDF

116.9 KB Created: 2021-08-14 01:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f5b59bf48e2567eb878ac0f5e670f322 SHA-1: b5cb7d77912451a374831c587eb1579eaf3a6b40 SHA-256: 6c105a22a8654f26fa26d2f68cd66295ecaa383ad204d5d21a67156bee052b03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with multiple URLs pointing to compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of these links suggests an attempt to lure users into downloading further malware or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108dfb625d23---kovuw.pdf In PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/f9r03uh66s49vn4p9s8q29abei/jumuwigavojo.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160abcbb99b783---lififijupidipaloxu.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d193a7e43c4---sesadutixi.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/damerogasinobotu.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607685284ea0c---bisomituzebalopenolakofub.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160736ecbb74aa---vimebutexodaxugoveziwe.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/todikijunovupuk.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/084eb26c088a67519917595fa430954d/72668926102.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105017d84837---mulagexeromagosumej.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/62482687447.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/ritatixipiviranibomo.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/51553322329.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/28f4f39245f700f6c4525b8c4ae9ada1/1269551020.pdfIn PDF document text
    • https://personnelcle.com/userfiles/file/givajatujefesitomupogosan.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ba3a3058c---72760676119.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/tuwazafovijiwo.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/22351433813.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/0ba624dcecc9e9c5c48027514e49e92b/nipiripotezufujadumepam.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f6b52ef12---8701151607.pdfIn PDF document text
    • http://kinogigant.com/sadm_files/77373576062.pdfIn PDF document text
    • http://takemehometomatoes.com/ckfinder/userfiles/files/sabozegajijabomutakevezes.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/duxoti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=onan+marquis+7000+owners+manualPDF 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_off0001637a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B91 10700 bytes
SHA-256: ccc4252998bd253ff352ab06eaefaef724badf7d892abb41cc92ae4002861dca
font_02_sfnt_off00019428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19428 19020 bytes
SHA-256: 438af0d36cb4cba5cee2f2b265debc5a7e9f2060adb2a8b030b4fdda8767a234

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