Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6b72feaa752025…

MALICIOUS

PDF

84.6 KB Created: 2021-07-14 03:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96cc0416f59050a765cd0b0f3e80c323 SHA-1: 27fa5d2970392549e1331ac331e9d1fcca1602f6 SHA-256: 2b6b72feaa7520257029ceb6e6d43cab35f56a8791bdc89e4a7fe8e7c1853f7c
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites, likely serving as a distribution point for malicious content. The presence of multiple external URIs and a high number of distinct hosts suggests an attempt to obscure the ultimate destination or to spread the malicious content across various platforms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/a691f746a06d9e0f5f205b92275204ad/98071611964.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef73065aec---firaxatapevunun.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdf8fbd512---22727250413.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/e3c31b463839bff9657fff6727fa2552/54851158527.pdf
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/33804264180.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/2da004d49fd3b5463daa3ef3366c320a/63163439383.pdf
    • http://varosom.hu/userfiles/files/moriwikelu.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2fd95872ceb5c0ec2a77525ecd8f012f/zerezakedusixanisonub.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbe6ed5d05---48505472522.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0jraobg0nt2ebb7bh1rp00e9rh/2283136374.pdf
    • http://www.greenfield-sustainability.com/images/files/wugowajelamolidiviku.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/7cma4aj1tmd26kcd9lnmbtau50/kezuligalumoveka.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b126be9096---naniditiwuvefikar.pdf
    • http://asiavent.com/UserFiles/file///76968277569.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f80b6d8c74---tuwubineruledevujimibosik.pdf
    • https://mgogs.com/mgfiles/file/90142332029.pdf
    • http://beautybybelief.com/admin/images/file/35540667300.pdf
    • http://phayaotechno.com/UserFiles/File/moxinipaparobagonono.pdf
    • http://drkoopman.nl/cmsimages/file/ratulanifobemeturuviro.pdf
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/57395384183.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df3939bed6a---50893244956.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16083b17a11de5---62277358439.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160946ba5379dd---nadusojalowazoj.pdf
    • https://betenenergy.com/sites/default/files/file/ragafeloma.pdf
    • https://spcinternational.in/ckfinder/userfiles/files/98467078850.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=foot+controller+fortnite+ps4
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e62d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE62D 16792 bytes
font_01_sfnt_off0000fe3f.bin
e3f768aaf2ed15cfe7ef796c87390e3bc8ea59fe9ce96e9245d7ce2312ecc277		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3F 17884 bytes
font_02_sfnt_off00012d61.bin
e9f47e1b4257e06a80b252e1c70177d14473777d5fb8f3e99de817126604d3d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D61 10364 bytes

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