Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb62ce9961c55cb…

MALICIOUS

PDF

75.1 KB Created: 2021-09-24 22:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 70c688447e2aa7395fede70d3994ea69 SHA-1: 5905dd08bd5ae890b2c247db39a8d0344241453f SHA-256: 8eb62ce9961c55cbb718327052626134471067e7fc30ed52d5ba4087d441605c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of 'utm_term=download real football game' in one URL indicates a lure to trick users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://study-go.info/wp-content/plugins/super-forms/uploads/php/files/2e02db66c1b34ff27fd08c1ab734d2f8/nuweno.pdf In PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/68267955048.pdfIn PDF document text
    • http://krupongs.com/images/file/33943286262.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/podefefudejujorinada.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/risotavabisudo.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/bafiwit.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315584cf3ab---3835029152.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/kefuwemapowopoko.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/38ba497c67955102ad259cfa9df263d9/42345382723.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/xejefovofale.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/92921320271.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/97590714138.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/48536305259.pdfIn PDF document text
    • http://eternoohydro.com/d/files/8137812328.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/wapibinogelusuxiwiwugeb.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/89207516407.pdfIn PDF document text
    • http://dar-tom.pl/userfiles/file/7188469825.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/85675543995.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/puviwejijevonodelebomid.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/80183636251.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/zovavode.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/4775619262.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/tumirasomeri.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/boriporejigagujetozevimak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=download+real+football+gamePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0D 10664 bytes
SHA-256: 83bbe5d4597717118297d57910d817188c85ff11cce9ff068ef4b80814dd2173
font_01_sfnt_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 18308 bytes
SHA-256: 5e83e5e4294fe9e5f6e45957bb651dee6d1ba99a31293ec9a299cceae754c270
font_02_sfnt_off00010663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10663 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1