Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0bbf10eaf0b12dd…

MALICIOUS

PDF

67.9 KB Created: 2021-05-09 04:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89fb96a6e762539516b12b331fefc100 SHA-1: 99e6511a9e982e099160a834f883f76e1b50b418 SHA-256: e0bbf10eaf0b12dda5f8d50d9b1154a0f62d89d56516c329b359303e11afb14b
156 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=abstract+nouns+worksheets+for+4th+grade
    • http://akinmedical.com/uploads/file/31807288371.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16088fa9abeb21---29136117851.pdf
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/sjormci2qnvu8taqc0o9dqljpf/40830782439.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d536b7fded---87395978479.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/5hk83j6iq14m14ebc8625dtto0/61908594888.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160865fbff3b9d---kolufa.pdf
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/758891763db8eb7c878bb222925a4ad1/fotowajoxorokapuverajo.pdf
    • http://altaprecision.com/userfiles/file/90927843267.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/cq7moja7ejs6pt8koespip25o1/1173023017.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1908baceafd7d83533c068d403f62ecf/pogizepomotow.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097174c06ebe---zimuzadigasifesonobuwetiw.pdf
    • https://baongochoa.com/upload/file/12752278254.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/576895afae6b5ecb1f8a517e0cb62ec6/podamofiponibewekixumagar.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16091785ac0950---xulexupuxenisufonuxonan.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0239b06ef---kedufozuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd1a.bin
3ee78eb751322cfa0956128034c1eb65cd8a8df645ca305135bf76327355b7ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1A 5624 bytes
font_01_sfnt_off0000e04d.bin
c7d36bd930422397abea4aa8a18c4d61f574e682f86e769f2ca5693765d8b9bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE04D 10112 bytes

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