Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae572fd2bed7732…

MALICIOUS

PDF

92.4 KB Created: 2021-07-08 13:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1b88dc626e2c56b4fb363a79074e6f2 SHA-1: 6df7f20dec89dc908f79d762b7cf403400913679 SHA-256: eae572fd2bed7732989387ac850b0785065732d58010c9751810afbffaf9bb73
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised WordPress upload storage. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1af2e74d58---belamos.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2abc37c976---87101289285.pdf
    • http://marta-galan.com/files/varios/file/45788823695.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ulhkpbkcebo6k404ptqp675i29/febopugakibegabazetilogit.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/69323e5531083190ed9753ccbf7d06d3/pibam.pdf
    • http://komputerzagrosze.pl/userfiles/file/jufimazijeluxidenelo.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c1f346ed2---59170614601.pdf
    • http://timandlor.com/userfiles/file/56904218005.pdf
    • http://pallenberg-busreisen.de/uploads/files/88209660100.pdf
    • http://thegroverestaurantnj.com/userfiles/files/kikinodolowoxijexepisar.pdf
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/latenowuvig.pdf
    • https://grup-insaat.com/userfiles/file/lewakil.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ce27b90e9---2404948979.pdf
    • http://ascensionchina.com/userfiles/file/83498834175.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58055462a1---nelikatiripofipe.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ade3ec6ff98---10418545794.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160aea50122acc---29347701600.pdf
    • http://epoxidice.ro/mm/file/54214653637.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/04d879gt31vl0s893o235g4ia9/11285053020.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712ffdc3855---mevopojilizizojusim.pdf
    • https://telorgabus.com/contents//files/weluzafatavopid.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/lcgte3puank1936nromlrhqkr2/62796707773.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079390be6d74---xaranosovapibuwakemes.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/f1f5283d29ad7bdebe8a8edf9f0573c4/jebokafinosasadabelirife.pdf
    • http://afghansolar.com/userfiles/file/xateko.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=liverpool+library+press+free
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8b.bin
b38f5ac64943698201f6d789e14fbbe9f392b4540836193393d43dbd0e4109f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 10424 bytes
font_01_sfnt_off00010610.bin
63cbdf9a44be3dbfda8bd9a9a49e02c8a808ec9ab4e53873353101d3aa2dd3a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10610 17996 bytes
font_02_sfnt_off000135d2.bin
6bc4420bbfa61156f096b6f0725168f8601d7500e332933a6f3144c23c09a2fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x135D2 16384 bytes
font_03_sfnt_off00014c1c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1C 16792 bytes