Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d21af7f17682dc4…

MALICIOUS

PDF

82.9 KB Created: 2021-10-04 23:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1343253aef87db5c2d42a5096c9829a8 SHA-1: 3945bae3dd34fbd2b72a3195be87fe4e0b8b5349 SHA-256: 8d21af7f17682dc4c9f1c889436b2abe71c5e8e4565456aaf2e651827b3bfa29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing and potential trojan threat. It contains numerous links pointing to disposable hosting and compromised WordPress upload directories, suggesting an attempt to redirect users to malicious sites. The PDF's structure and link farm behavior are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://pistant.ru/uplcv?utm_term=time+in+maghrib PDF link annotation
    • http://mikomisushi.com/uploads/files/kezezokame.pdfIn PDF document text
    • https://miet.hu/kepek/18033091289.pdfIn PDF document text
    • https://giaiphapthietke.vn/media/file/files/556156479.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/senalasovipevovozadu.pdfIn PDF document text
    • https://possamaiferramenta.it/uploads/file/22805832748.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/69751219847.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/pumewetegadazorexi.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/99002426898.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/saxotepexumez.pdfIn PDF document text
    • http://captaincook.hu/userfiles/file/79555888743.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/waduvemaborufalupapugad.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/2956b4f8f296517f4cfc142282dd5e91/38761951321.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/vokazozagoronazoxitafijut.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/kutuvivoxejapasupo.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/48339476713.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/35651190547.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/27699329964.pdfIn PDF document text
    • https://nurea.se/currency/userfiles/file/gibevawez.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fbim4691volp9kls3epepavf63/minonezifojiguvotidi.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/d9873bd225ab07cc4f4b1da23f743341/zororibube.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/36809254843.pdfIn PDF document text
    • http://hitechdentalhouston.com/uploads/files/34544352761.pdfIn PDF document text
    • http://jobsmarttampabay.com/files/public/femikajufizovun.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ab1e9dfaa---tomiditutalirulo.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/61724767832.pdfIn PDF document text
    • http://www.agot.pl/upload/file/40113030042.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_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 10228 bytes
SHA-256: 89f7fe683194f40e454a1cbc8ca8f2e6e43123a8698bed0ee38e4c1424dc403e
font_01_sfnt_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 19696 bytes
SHA-256: c3c09dc7092195ac7a8fad297e1209009bf7e494956c5ca98797b24dddc952c9
font_02_sfnt_off000125fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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