Malicious PDF — malware analysis report

Static analysis result for SHA-256 889eba3da334959d…

MALICIOUS

PDF

83.4 KB Created: 2021-09-24 07:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ca5ef59bf84698730825c5376514af53 SHA-1: ce063377e53202ac404753fa7082a86031638ef4 SHA-256: 889eba3da334959df972a884c3de8423192e012e6e40aa1f21275077d385fe31
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which are hosted on compromised CMS platforms or disposable domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attack pattern designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.itidharamshala.in/images/uploads/files/jetosurebepa.pdf
    • http://taikenplan.jp/ckfinder/userfiles/files/tivofusofit.pdf
    • https://skykharchono.mn/editor/files/wifigubukejenexitixove.pdf
    • http://farmina.ru/uploads/files/5689219190.pdf
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44545463281.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f1594bcaf---gugebumepi.pdf
    • http://j-line.ca/fck_upload/file/jilos.pdf
    • http://jplus-ag.com/upload/files/BodyFile__613B593C5CB71.pdf
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/vunedetilivofatokopiweda.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328b7bea35b---mibizadumip.pdf
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/64862360354.pdf
    • https://foodvellythailand.com/upload/files/ketoverufeder.pdf
    • http://chinalabware.es/d/files/rixoxewodopafafaninizi.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/6f9903922ccc06534577e2ae1aa07b82/luxexozifofasorad.pdf
    • http://ryyw.com/upload/files/2021/09/202109201449168412.pdf
    • https://stallion-international.com/userfiles/file/65423795248.pdf
    • http://srilakshmienterprises.net/uploads/kajabos.pdf
    • https://macauroommate.com/ckfinder/userfiles/files/duramezoguravijodiloz.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143aaa9e79f9---mimesejozuwagegoziweme.pdf
    • http://ogcdc.org/uploads/ck_upload/files/68271980322.pdf
    • http://glovimex.com/uploads/ckfinder/files/sonenatenotalifonud.pdf
    • http://vibratingsieve.com/d/files/57880337992.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5683e7033---nakovozorewowunagit.pdf
    • http://lucidareemantenerepavimentifaidate.it/userfiles/files/vitinidagi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=england+vs+australia+free+live+streaming
    • 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_off0000e1a0.bin
476010003328b3082c2bf1504e729f37f4013dc8fef5c6b9290b5b2294da7d2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 10724 bytes
font_01_sfnt_off0000fa0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0B 16792 bytes
font_02_sfnt_off0001121d.bin
696d5f8577bf0e2fc7683f8774d5f8bc3104a51ad68307276fd5fa4e9ca98ad0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1121D 17464 bytes