Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabcdd81c745b8c4…

MALICIOUS

PDF

79.9 KB Created: 2021-08-11 06:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5b3d4ff385630b0069f56cf52af6fa9f SHA-1: e54c48c15e1166ba8bbba1b2004eeff4b0adda14 SHA-256: dabcdd81c745b8c45ca02a5bf646f16f29a2877ff8040473ae9f5d178da25261
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting a phishing or redirection attack. The PDF structure and link farm heuristics point towards an attempt to drive traffic to malicious or compromised hosting, likely to deliver further payloads or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/ev99mpk7io4nmggkm26ebeatp9/gepomivola.pdf In PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/fixusawipezojevepe.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160b23d2609854---jexasobuvatad.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c8a10b5ad77b6281f82594daa827bc24/vijevebeduv.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/xewixobunagapuvox.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606f39a908447---luvep.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/48de526775d8ffbdbe9832be9ad91bab/vopif.pdfIn PDF document text
    • http://e-district.org/userfiles/file/xusodaporasilu.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/vubiriboxetutupulukuxi.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/83166653222.pdfIn PDF document text
    • http://poolprotektor.com/userfiles/file/29587789209.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/76601778747.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/motofidananorifewemi.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/lowalonuxuwa.pdfIn PDF document text
    • http://greenbrier101.com/userimages/41490941665.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/vovaf.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/eadkmppcdlltdll7o2ud1h984b/wasegewizaxor.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085643d7f747---64546400147.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/tidegagumalew.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/gisaja.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/finubuze.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/kogenubaxinerewepodefozob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=macroeconomia+blanchard+pdf+downloadPDF 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_off0000d217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD217 10840 bytes
SHA-256: 756c4be82d8c4b9726a1049a522555ba9505d42dc7c1b1c0faa4053f4ccc5c1e
font_01_sfnt_off0000eaad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BF 18164 bytes
SHA-256: 242a3fe8a4ae42838643ce1d457e67d59806b78d4f44cc4c98a388c5e771626c

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