Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6c5d0378c13ad0…

MALICIOUS

PDF

76.7 KB Created: 2021-06-18 00:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c9ea4770bb34697935707d59cdec5c6 SHA-1: 1084ee2058fbd2ae3f102a6a39df7c48eff0b903 SHA-256: 3c6c5d0378c13ad0f2dd3b2150c95af1af7fafba5935680a05a1a0dbe6d9d3d8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress sites, which likely serve as a link farm to distribute further malicious content. The embedded text suggests a lure related to a 'Fallout tactics save editor', indicating a phishing or scam attempt.

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 https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cf6697388---puwelurezokinazabid.pdf
    • http://pinturasoltra.com/images/slider/files/36540839509.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/srricorvmr6ao0kfboi4qe7g25/dodakovalokex.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/1757d190c71fd4b04894ca09be8cc3f2/zoxutiwoxexifuvu.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62f55ced5d---99016832005.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/4446cjudkru5bt0t3ngo9dleg0/83548577070.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/c5fb3149af77bd073fc8afec76ac7dac/42421026052.pdf
    • http://fuga-hotel.com/CKEdit/upload/files/koxedozewetu.pdf
    • http://ibshop.gr/uploads/_uploads/files/mewujax.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c15bdc2cbc1---98051427695.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16099f3ff4d06b---22538483036.pdf
    • http://archerelectricsupply.com/userfiles/file/panegikozuzamosok.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/a8c409f89bed240987de95180915685c/22773420378.pdf
    • https://muratay.nl/userfiles/file/piweba.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc48a465fe---20456229098.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=fallout+tactics+save+editor
    • 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_off0000ed9f.bin
8b38cc4ca17839232038e3c80f31c95b380171b54e48d92cb52dad160ef6744d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED9F 4948 bytes
font_01_sfnt_off0000fe85.bin
b35cc317b4eadada11a4aad84f9c00312072f6c874f3863f410a81533f1a5a52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE85 11500 bytes

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