Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0f77355febf04d…

MALICIOUS

PDF

80.7 KB Created: 2021-09-02 01:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9f123c0f94b68752e6a61f869960c4d6 SHA-1: 1709ae4ebf9d10d72c14359da213a5f0dafe2499 SHA-256: 0a0f77355febf04dfd22459fba384bc01da697647be6b107d957ccf03e61e6b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=push+and+pull+worksheets+for+2nd+grade+pdf PDF link annotation
    • http://clubselectionvoyages.com/images/file/73249109344.pdfIn PDF document text
    • https://digireg.pl/upload/48410996910.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/72804755166.pdfIn PDF document text
    • http://agriturismofattorialucciano.it/ckfinder/userfiles/files/27528171888.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/peresumutimagiw.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/79608282743.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c51e517afce---mixikikosako.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/52177402770.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-7-28/20210728034120535541.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/73449939937.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/savaxap.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/f359506b2868b4fa114d5114e0831308/41330654073.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/56437349543.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/50104364381.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/jiponanerog.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/f0a3b32e292931620c5435d5e24c769c/kuxutokajemodabobazuwanin.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d331e52847b---79456250724.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4dec17f55e---pigami.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/89117913866.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/mejoraturotigus.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/11556828199.pdfIn PDF document text
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/sitetasanegogatuwuruj.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/55438560163.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d73f5d5bac---96567101878.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/k9kkpg50bnk84mf9le2co1aqk6/fitalefufebaker.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_off0000d4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AC 11084 bytes
SHA-256: b7d1345b8de2ae912895d7d87bedaf5374e624beba09f1efc0e16f3901e65c94
font_01_sfnt_off0000ee6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6A 17548 bytes
SHA-256: 61dcf0be94950052bf75de153655cb1bbbbc1d141ad5239f7e22f8e27cd3919d
font_02_sfnt_off00011b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1