Malicious PDF — malware analysis report

Static analysis result for SHA-256 d722808ed1275cb3…

MALICIOUS

PDF

73.5 KB Created: 2021-06-25 19:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20d2cc888ff3b320c700d331c0ff458e SHA-1: 9dc96acbbb766d452002dc8ba9c6ce2b46e28667 SHA-256: d722808ed1275cb3b819f5b3a285509840724e764c65f734cf79cff11a106850
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://philabc.ru/uplcv?utm_term=overlord+3+online
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/1gcufk2iufuts5m45ph9ebkklq/nobotidonom.pdf
    • http://inter-travel.hu/_user/file/mojabu.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fb7d7c330---2844467278.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2430558242---xesexo.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210609131215.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85f7f2852---lopuborirewuzolenewuvedo.pdf
    • http://writtenmail.com/upload_images/file/14861663410.pdf
    • http://alexandraharris.com/clients/36054/File/tazexurujolivuxarij.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ded46fc49---68645687026.pdf
    • http://x04ydivan.ru/userfiles/file/telesab.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/21dd1c1af6672fc8fec5313a9421481f/94355866020.pdf
    • http://noxsun.com/jingkelun/userfiles/files/20210603110303.pdf
    • http://suamayin.biz/userfiles/file/jagagamobukeregigafira.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16082fad11c064---xegabogunomamavabo.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/aa5810913db4572d8fcb233d87052f5c/gibitezejujupitumabi.pdf
    • http://banghaija.com/userfiles/file/letaxejodogiwupiz.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4acf1bee78---30212614429.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7602b9085---debare.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f09e97c534---62024731073.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfe2305bef---pidajeleluroturudugitog.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/64mmpskr50ikajqdjnv7eqp284/42827228628.pdf
    • http://ipost.mn/ckfinder/userfiles/files/66545563757.pdf
    • http://www.armstrongre.com/files/files/15459311201.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/3j3rjvg381t346qukp5ib51ams/satosinetifavuge.pdf
    • http://microlana.com/ckfinder/userfiles/files/3079389201.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://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_off0000bc16.bin
dd7b414887cb82de8dfcea3d2426e936a202e9645f861c99056e59bfd9f24505
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC16 17672 bytes
font_01_sfnt_off0000e8f7.bin
c36f47fd9ff4be5a553a7356cc629c6cfbe2089f106ef7516527c83f67b552a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 10076 bytes
font_02_sfnt_off0000ff86.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF86 16792 bytes