Malicious PDF — malware analysis report

Static analysis result for SHA-256 12bd65949811d3a6…

MALICIOUS

PDF

76.5 KB Created: 2021-05-06 18:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ea5a9ad5a0c16f2293d80a1c2f3e0a3 SHA-1: 3060530ef7e83cecd34b8e25c87806096452add6 SHA-256: 12bd65949811d3a6958140e1be8d3a7cd19bacebfc1bf38dc38b13b6e6f43fc1
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded URLs are consistent with a phishing lure designed to redirect users to malicious content.

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://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d1721130c---juboredojuxafod.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/b6a077e216833c77660ddfb4351fc1d3/26716258410.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840af4a5f6a---26181648863.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceabe3a993---kagutan.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607501d79c48b---93309711592.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607813863ce8b---bosepebux.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3f5eb336c---sujewalo.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160932af82dcd1---64739140289.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/e26c1650671893a108625fff9b806760/witibowamulovun.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/efad3fbe3cead9ca0bd8a37464ec009b/85978244257.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/dfd4223cc2aa094d38b4356fc5895957/9710159240.pdf
    • https://alice-immo.com/userfiles/file/15939718624.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160755190b25af---29800448548.pdf
    • http://accessiblevehicleservices.com/userfiles/file/36498360591.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/gbg3n7ahsc2uo9clvrlo17fene/57285608400.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/796426ccde8d49259726bbed468213d1/81806731210.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=economist+7+july+2018+pdf
    • 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_off0000ec32.bin
541cd808699c37766f27565b8c60de7904664504deab02771dc09fdd56622d7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC32 5732 bytes
font_01_sfnt_off0000ffd8.bin
86780158bf9dc7f2f0a39e3484877917b26067397398db1f2ae3f8adb34db4a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 10964 bytes

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