Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbeb92cd1f7d558c…

MALICIOUS

PDF

95.3 KB Created: 2021-03-01 15:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 96ad593c3c8ec4a19e8dd6da52928713 SHA-1: 6e9335e4680383d814d27dc9c4021be94f5cb816 SHA-256: dbeb92cd1f7d558ca598e5b854a6743ad1bd930f09622b02a9efcd61a5d90393
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, and the ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains a search term that could be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://botokaw.ru/strik?utm_term=logitech+z+5500+remote+code PDF link annotation
    • http://sy0n.icu/wixixasusunjj802.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/49306571776.pdfIn PDF document text
    • http://avto-trokot.xyz/lexofidi1k2l6.pdfIn PDF document text
    • http://arendagg.xyz/craftsman_house_colors93eqh.pdfIn PDF document text
    • http://ital-tess.space/sovatomunezegebibatotufowx4foq.pdfIn PDF document text
    • http://juxefagag.22web.org/nuevo_uniforme_pureza_de_maria_bilbao.pdfIn PDF document text
    • http://raicen.com/zovotumixotosubima6jgxm.pdfIn PDF document text
    • http://detonic-romania.website/yowhatsapp_v8._0z19x9.pdfIn PDF document text
    • https://zugowexilib.weebly.com/uploads/1/3/5/3/135349829/jarabofe.pdfIn PDF document text
    • http://noksipals.online/431863205179lm7x.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/ib3IXij/86654667675.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/little_alchemy_guide_to_make_humanihgoi.pdfIn PDF document text
    • http://quickpapp.online/60381801430o4xdj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn 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_off00011273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11273 4872 bytes
SHA-256: d10e6beb571e397a9e35a7890ebfc20369f1b546b4d1f841dd9113e6c6e88898
font_01_sfnt_off00012318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12318 12372 bytes
SHA-256: 6d9c8b3d0d1f459d2620ca15dd9ce61c4a8ddb8bea35980c4d6790f21a2d49bc
font_02_sfnt_off00014c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9B 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d
font_03_sfnt_off0001619c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1619C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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