Malicious PDF — malware analysis report

Static analysis result for SHA-256 295ebddd65ab5488…

MALICIOUS

PDF

85.0 KB Created: 2021-09-16 01:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96138a7a669cb9a69090662b131b78f6 SHA-1: 2a1229ca8918e9ef78a0b65e4a6124520dd46a06 SHA-256: 295ebddd65ab5488d099d899c9e899fd6dc64ce4abdf54b2f9808495da143bf1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm structure, suggesting the document's purpose is to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly support a malicious classification, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://copacndg.com/images/uploads/files/73064538159.pdf
    • http://ecovn.vn/uploads/news_file/zonasobibokojaxora.pdf
    • https://bosgo.mn/uploads/files/pokipugaditurev.pdf
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/7117447804.pdf
    • http://royalgoodviewresort.com/Uploads/file/xonovusezijujexefemedef.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/1g8thihf3837uckbrnp92kg6f6/nitexo.pdf
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/19197174618.pdf
    • https://daulte.com/ckfinder/userfiles/files/49435817148.pdf
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/93422427046.pdf
    • http://denis-lefebvre-services.com/fichiers/file/90996560350.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614207aa2f7bc---88379683722.pdf
    • http://e-park.es/img/uploads/files/lozewisuvabo.pdf
    • https://palezieux.com/ckfinder/userfiles/files/fubuzas.pdf
    • http://topstec.com/d/files/lelugixagamujedisajoma.pdf
    • https://spyboarcams.com/files/99361460661.pdf
    • http://thanhtindesign.vn/uploads/image/files/sutojimexukag.pdf
    • http://www.musicboxpiano.com/contentfiles/37585365100.pdf
    • http://peach2560.xyz/js/ckfinder/userfiles/files/xoxijakog.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fb3c1f113---luruguzodi.pdf
    • http://rovitek.com/userfiles/file/3969111473.pdf
    • http://bluecreator.biz/ckfinder/userfiles/files/48016528453.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161426ceeb7c73---82116819189.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370e24f32d9---93628454599.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=miui+12+release+date+redmi+note+9+pro
    • 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_off0000e4ff.bin
95d19b732b2e3c5ef824f04c0ab1faf5629e62cb01ffe35e6cd91cce5f005f23
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 18096 bytes
font_01_sfnt_off00011484.bin
7752e14d5f7dcefaea11a0c23d91894afc81b9a110c12aaaf75b37ae4cacb770
pdf-font-stream PDF embedded font (sfnt) at offset 0x11484 10984 bytes
font_02_sfnt_off00012e14.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E14 16792 bytes