Malicious PDF — malware analysis report

Static analysis result for SHA-256 209e31bbd87eb298…

MALICIOUS

PDF

76.7 KB Created: 2021-09-12 20:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6f92b09b1c21672e22bd9ca57d20c3b3 SHA-1: 9f49e777080b8647e83dcf4a183e2b19cffd0837 SHA-256: 209e31bbd87eb2987f5e23fd3631512f6352b0581e43843f238c981b48541f2d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and a heuristic identified it as a link farm. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://geonatlife.es/ckfinder/userfiles/files/49688866422.pdf In PDF document text
    • https://masihpt2.com/contents/files/35268166312.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/95653655303.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/cbbd9d2b7baab3f30ff70293fe4e694e/kuluwapuwovorawixe.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/42933233250.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/benij.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/nenelibejobejerazoxekit.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/56311326328.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/xonowanew.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/15609842404.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/1848614164.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/49244542197.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/49450950088.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/zuvaxatidibevulovilokera.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/fifiziloburoxonige.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/pofudoxiwu.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/xivenum.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132de37cb3f9---79480348822.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/gesisagesenas.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/34368726988.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/saliporefoju.pdfIn PDF document text
    • http://safarang.com/basefile/files/89297992029.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/28953490744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=dota+2+horde+modePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB047 18788 bytes
SHA-256: 6f7577c7858ef5d0e0609d12fff0e2909a1377d61fe73f823bfd0c67c19d17ed
font_01_sfnt_off0000dff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF3 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_02_sfnt_off0000f5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E2 10224 bytes
SHA-256: 638ea0f7483335d75422f0f2c543d5ee14c47ebbb79f78c180ab5bb8dbc40c7d
font_03_sfnt_off00010ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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