Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2955869a770491b…

MALICIOUS

PDF

89.8 KB Created: 2021-08-02 01:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bfbbc0972babdb5377f55b0f924b8c4e SHA-1: 501ba61c2513ad3b9f43a09db0fa0d88c08941a2 SHA-256: d2955869a770491bc57411babb39c2dd67eda01c0290a697ca4e3f2ab3e2c34d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs that point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious destinations. No scripts were extracted, and the document body was unreadable, but the presence of many external links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://laborke.ru/uplcv?utm_term=crash+twinsanity+iso+pal PDF link annotation
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/5f1e6fce28143b392e0df6e86dd5354c/jadokan.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/fnc6i34jak0nqokgte4dllbab2/sekisog.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/dng58lad2r8ncpea5viuf43a55/luseseguwi.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/22978988016.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/32450231645.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/pakogafo.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8873e1aa1---81060355131.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/44543670282.pdfIn PDF document text
    • https://genimmigration.com/viking1/uploads/files/sozobi.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff3d274aa1---51615270712.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/likaxenurexozepimitene.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/23881138048.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1625228691.pdfIn PDF document text
    • https://raljob.com/userfiles/file/vitatotisek.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/clso55aap32qn8take3od6jdp2/davopabaso.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/27844064988.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/vajazozo.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/7c68dafe3201fc22d052a026dd4416f2/22141882464.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092d7d24d379---lusisobagawefus.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/75879426894.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/97294571250.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/20217312225549837.pdfIn PDF document text
    • http://cartopack.com/Images/file/17973765185.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/ce0b4717cb56fb57f3810c09512cf91b/lozetexojowelazuxerodadaz.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d815aa83e96e53e70cda8e9bf154b3ed/79478384823.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_off0000fbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E8 10448 bytes
SHA-256: 7353b814e2f125d77f7e5c23231afda6d7432c529235afeb641665b700ef6bda
font_02_sfnt_off00012b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9E 17448 bytes
SHA-256: c770a7f2462e25ca51156365b1a6fc4ae5a82342d5d73066730ecb74e439b2c8

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