Malicious PDF — malware analysis report

Static analysis result for SHA-256 3209ceb2a33c3f0b…

MALICIOUS

PDF

78.3 KB Created: 2021-08-12 00:34:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f461b9ab9e11163c7752ca3465a097c9 SHA-1: fee60e739bd5666ff2179c07eeb691d8af1dabbe SHA-256: 3209ceb2a33c3f0b912410792b1c6a7d534ec7d3a6ef692bb20dd9fca88925aa
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or lead to phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://yoron.net/up/files/21116672377.pdf In PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16201952984668.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210803_2C0B9C0FFCA97CBE.pdfIn PDF document text
    • http://brucemaymemorialgolftournament.com/clients/d/d2/d245e0393a5bbb16d67b82808c007790/File/16551844327.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/zibulatizuguled.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ec8176049eb4769d6174bccbd9581c23/78137331389.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/05a3ri6vson65r0buchrh26fc9/59761845809.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/cc2c10ed0978171210c911ac410f8651/penokixi.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/rigatiworizodekevuvodadi.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ed9b622c6b6---84103643029.pdfIn PDF document text
    • http://www.centralperdana.com/file/pepup.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/pijoralekexafunuf.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/1d5cb15c9da931da2139e27b6c1df0be/56588918994.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960a36d217f---89865997436.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/84673778524.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/8871123807.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/togeraxematuzefofixas.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e01ffe8fdb2---waronokomikulekegiva.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/5453697345.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f472c97e13---89343581151.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210809_035705.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/xedatuvemeno.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/nefimavalunaripivow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+use+ifrogz+truly+wireless+earbudsPDF 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_off0000cf10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF10 10916 bytes
SHA-256: 622a79f4f9ed80bbba45b6e81453dd7c23579afdf795cafcdfafdeea699e5a74
font_01_sfnt_off0000e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 16596 bytes
SHA-256: 2286b35dcc876be1a1f80712958dd5e24a0ad68155dc8519fbe18c2c0229b16c
font_02_sfnt_off00011377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11377 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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