Malicious PDF — malware analysis report

Static analysis result for SHA-256 c380608692abcaa9…

MALICIOUS

PDF

68.2 KB Created: 2021-05-10 01:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5e20d247e165c2b04fedef7e2d9f91e SHA-1: 71a0ae54dd69c7595807396d74228a34576aba53 SHA-256: c380608692abcaa9791aaacf7ba21b3271458da4e938257c0b24147c43c70d88
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

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 http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c48b6e62b0---79260582585.pdf
    • http://noahsmarinesurveyors.ca/userfiles/file/88343381969.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608389d12829c---7516488701.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/467e8fdba411ed61305685f93385082d/lazukijibobumag.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/9d1a4d410fcf825ea7aa8e54f2b13081/13350073035.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca02290b3b---zedevobevek.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f0aad2d56---wasesupasakozugemoga.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3b2b2b6cb1d057e312c44ecc3e02c78a/janikirita.pdf
    • http://goteneplast.se/files/images/file/pudunanamesexapasewiwugi.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750014a078b---bisadolanobu.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/mss0k1fphk04aqemluh571m26j/15799773939.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/034ce6be18cf8caf46f53776251b892c/kubafuvaribexevegowaz.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16074278689373---88149830325.pdf
    • http://beachfirebrands.com/userfiles/file/zizerevonajarem.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094d3e57d21a---82961805401.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=spelling+for+grade+2+worksheets
    • 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_off0000ce77.bin
3f713483485074266d5ecdd5ebc9a372e5a19df90f072aff0715af0cbcc91846		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE77 5696 bytes
font_01_sfnt_off0000e1f1.bin
4734bf3017514c7031bd8bdd3290b28bf9e9afacbf5466f7138be7af3846bda3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 10072 bytes

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