Malicious PDF — malware analysis report

Static analysis result for SHA-256 182566b823ad0301…

MALICIOUS

PDF

86.0 KB Created: 2021-07-25 01:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 05733e24a36b076c3ddfa150661d3a55 SHA-1: a8e175bbf55edc7deecbfa18348b667b1a748f7a SHA-256: 182566b823ad0301fa7003382bf3f661f5a3406372449134baddfd7837059036
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The primary purpose seems to be directing users to these external sites, potentially 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 http://cgpreceptor.com/ckfinder/userfiles/files/mifodafoti.pdf
    • http://veterinariomauracotti.it/userfiles/files/zodubewoju.pdf
    • http://rgn2u.com/userfiles/files/xodikubejezosi.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6da4459be---41436731714.pdf
    • http://akcjonariusz.com/UserFiles/file/9321316618.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f2e864dfb---87853724563.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/cf1a19653d5b51587beeaf435baab252/sibav.pdf
    • https://transport-vehicules.fr/userfiles/file/28274163880.pdf
    • http://s-moonlight.com/CKEdit/upload/files/misemunizamurava.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ijg9lnluf3q8fc6fbhh0jk5d97/44015717453.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918942668cb---7241646582.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/edaaffe14e8ef90e708feb150eac5ed8/61023677103.pdf
    • https://thehero88vip.com/ckfinder/images_store/files/50743806666.pdf
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/79951633612.pdf
    • http://gesundezellen.de/neu/userfiles/file/3253615821.pdf
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/vuvigiwedezetajezuki.pdf
    • https://atraba-holding.com/userfiles/file/lidijowo.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794048aa8f5---bididim.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8a3cd9d0fa---volijisu.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/kh90eciavvtqd2j58t8cbn10bl/71897243805.pdf
    • http://jyotiacademicpress.org/uploads/file/biwitiloxepapibokaj.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eddcb2685ae---23348797268.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+do+accountants+do+on+a+daily+basis
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edff.bin
4949faca8377a13b92093b9da07836558f95dabc77fe6076deb206bf0b961973
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 16844 bytes
font_01_sfnt_off000119c2.bin
49e50b0d1f32f02a8f0b8874d80a6eec578e4eb8fbddf10466d87fd4988a975a
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C2 10584 bytes
font_02_sfnt_off000131e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131E3 16792 bytes