Malicious PDF — malware analysis report

Static analysis result for SHA-256 50bb1d50e402271b…

MALICIOUS

PDF

72.5 KB Created: 2021-05-10 05:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5daaab96e96b7da925f4f34cde16e652 SHA-1: 69f61e77be6e222ec79ab970a897791e1acc05fa SHA-256: 50bb1d50e402271b862ce37cb95af5ba8e6c2dee264b3a3137216deac7f9e49a
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress sites and a suspicious external URI, likely intended to redirect users to malicious content. The document's structure and embedded links suggest it is part of a phishing campaign designed to trick users into visiting harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://smidgel.ru/uplcv?utm_term=convert+bitmap+to+byte+array+java+android
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160837e0566292---bekozoguwamozibatup.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2s21qhv7a664d84l98lhfemn20/38272085989.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1d5eca21c---ritatonakidiziwi.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/ca0ebb2d4466d664e162c2b04019f085/37313768366.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/afef8f977c7ff9410619abf6a6a5d059/77986199884.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a0db4949d---kozusovevemukuza.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082623635023---54168544850.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160720bfc053fd---zinogomolofudebeg.pdf
    • https://samarpanbharat.org/trila/userfiles/file/finokapetowobomezegofami.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608382e369834---86633493965.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/qg2h08v68ge9os1ei7ilqd6sai/71149070144.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a35f98b92f---bufusidutafasemawil.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/3c481cde1b772e8b5ead9f146ed935ee/zexowawo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6e9.bin
116dbf10b4b015fdd5b3af47a5c5304ed37baafb4ac33bf5cfda139a918a27b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E9 5084 bytes
font_01_sfnt_off0000d819.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD819 1800 bytes
font_02_sfnt_off0000e0a6.bin
ef9c9b1ea676045f9931a3f01d530b1269c3f1472a2df1652fb27249033f1010		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A6 11056 bytes
font_03_sfnt_off00010695.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 4324 bytes

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