Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4c90216a4835c9…

MALICIOUS

PDF

82.7 KB Created: 2021-09-04 01:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7a85fd2930d5a51fde3caf4f541ee304 SHA-1: 4adbbb73272e7e05cb3b053a0fe7d9e23228adc8 SHA-256: fe4c90216a4835c96fe7db3352d8caabc5d5470e0e60f11c020303800821279e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the link farm structure is a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/qq8jfjgs9l36a54u18bf405tf8/dadipavigodanugudewifen.pdf In PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/2ff34baf12ecd4f969ebe903940a36e3/bumaludajabu.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/370541164.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/71224805965.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/jabonazutar.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/98435ee484a72a0fadc73b6b8120599f/ligeledofajerokem.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/burosuvaponivixopuvogur.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/zudulekozobisujekidawe.pdfIn PDF document text
    • http://jamessham.com/admin/usercontent/file/57560701729.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/jobebesomusubizuwugif.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/05dfbbef8b714fd171b4ed944fdd3a5e/85593888929.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/9jha77ju7mi9qded3gdp6bps7d/29332633788.pdfIn PDF document text
    • http://mchs67.com/clients/6/60/601da637195afcc8544498be66ee72b0/File/vadiwuxuvagodutab.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/1165375442.pdfIn PDF document text
    • http://alvitraders.com/files/totusamotaxagux.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/51458043901.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608556a7a0229---19673610337.pdfIn PDF document text
    • https://noddy.nu/images/file/sakira.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210807171901.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/43847620949.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/favobulev.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/21300015758.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/10123392997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+game+pickup+book+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB0 10844 bytes
SHA-256: af4058ac56e250012fa70e5920bfb35a34f38aac6de00cd89f69b28764291e5d
font_01_sfnt_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 17412 bytes
SHA-256: e04024f7a7592138732495f8442e5b81bb2d0343f37b8f9f5df532f7ea7cfb82
font_02_sfnt_off00012596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12596 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.