Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1fafaf913cb314…

MALICIOUS

PDF

74.4 KB Created: 2021-09-21 21:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f8ca7aa973878530201adb2762104745 SHA-1: d8dfcd692477b08c7a5b7d215c63afd4e9ade50c SHA-256: fe1fafaf913cb3149bb176ff55d44ec528dded2df2ed3f625331a3f8af81b000
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://oniceh.ru/uplcv?utm_term=exodus+live+tv+iptv+app PDF link annotation
    • https://lodoshosting.com/calisma2/files/uploads/jufilojezamed.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/gipunijedaxusopoku.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/sivagidozopetafediw.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210906115731.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/gefivusixelulu.pdfIn PDF document text
    • http://poiskvod.ru/images/file/jivop.pdfIn PDF document text
    • https://wmu24.ru/media/file/69908703667.pdfIn PDF document text
    • http://mastervin.ru/files/file/wigoxijazafefefuwufufom.pdfIn PDF document text
    • http://uteambio.com/upload/files/pozutasipoleruzana.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/monajiridipigevijupod.pdfIn PDF document text
    • https://ghnservizi.com/file/1137293302.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/8434718874.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/kuposijazatinodosunudugod.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/tulubatizu.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/88607963812.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/74345873377.pdfIn PDF document text
    • http://adgroup.co/userfiles/file/zubuxagisukinavezi.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/lavad.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/9930103967.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/6931096366.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/82178110643.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/42397151114.pdfIn PDF document text
    • 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_off0000c1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 16944 bytes
SHA-256: cf8b41273408978cdbd08ca4698532bd9b4a9af62191b6a7d54e897d5848637b
font_02_sfnt_off000104ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BA 10432 bytes
SHA-256: d27ef1199a25f155829e70d1a5c6f7ce399e41d7b0d0afe07f29a4b67d5412a1

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