Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5bddd97b9e9cca…

MALICIOUS

PDF

88.9 KB Created: 2021-09-16 13:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: db2472c8a4cf621f307d115d025cebbb SHA-1: 087d243b133bcf82344dd2ad36d08e4cb66c4f48 SHA-256: 3b5bddd97b9e9ccaa814cd1a8084e3726bb56ca8ad9e483d5e8670d4c67c9dfe
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://likebarcode.com/image/files/20210906_205102.pdf In PDF document text
    • http://leeharringtonhomes.com/userfiles/file/logitugajorekidozo.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/zuvukewen.pdfIn PDF document text
    • https://renetravel.ro/images/files/dolekiwaguxafovimoj.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/gebedolulenabanixuz.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/161427b8b59c2d---pezunevatenajawi.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/37119714600.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/fobidasalir.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/30965889140.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/87027761081.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/resakemigubanovubegasena.pdfIn PDF document text
    • http://budropol.de/Upload/file/zutivi.pdfIn PDF document text
    • http://builderall.info/userfiles/file/85139173597.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/41513230366.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140997a1120e---35490894954.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/namabomizibizebode.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/wesijirunedumakawosuja.pdfIn PDF document text
    • https://ladymamashop.com/uploads/files/202109030747593589.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/paxujapokuberuzoteruwude.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/14914116563.pdfIn PDF document text
    • https://kamwalibais.com/userfiles/file/damerajakepivo.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/71bb032e31765cdd9b83b64eebe76305/pejomawagogezodovejege.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/7bd8f03aed5a44899ed2c266b7e2f0d0/wopokexufatofosedeve.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16139d39471585---jisasafup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+use+phone+as+tv+remote+without+wifiPDF 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_off0000f418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF418 10820 bytes
SHA-256: 1a6d464fc7407de66b3a1f40a25f5760612ab27abe881a6355c85e3e6c9a7b60
font_01_sfnt_off00010ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE8 18664 bytes
SHA-256: c5a89555fca8acbc3d875b358d6b0e6436f6771a6c161045d32bcd71b257d9f7
font_02_sfnt_off00013dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.