Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eecebe9575de2c8…

MALICIOUS

PDF

78.4 KB Created: 2021-09-18 01:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6c49067492b4101e71f380d955421f33 SHA-1: 79eec94d893f5e69445834cd99c509a57f3453e2 SHA-256: 7eecebe9575de2c8acdcff445d48a168bfd48eb0c6a82de64e65ecec513068a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and multiple external URIs, flagged by ML and ClamAV as malicious. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm structure, and the SE_CALLBACK_LURE heuristic suggests a phishing or scam pretext. The embedded JavaScript likely facilitates the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://chennothinterios.com/uploads/file/21208903297.pdf In PDF document text
    • https://godahoian.com/app/webroot/upload/files/tejiwelugor.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/19421851467.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/82064693312.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/venirapexisugewapeg.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/fikuwibavabobagewo.pdfIn PDF document text
    • https://o-dance.com/upload/files/64579629668.pdfIn PDF document text
    • https://www.l-games.jp/js/ckfinder/userfiles/files/popofenuguxolas.pdfIn PDF document text
    • http://sirinthepgroup.com/userfiles/file/56455077272.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/fedini.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/vutosivefa.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/53134719656.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/larodomodopabasepalubon.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/90022972268.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/23479435816.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/suzesanapisuruwipimij.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/nivamavez.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/7141341967.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/26026348803.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/256d0ec5d123f68d66a9f9cbbed58ca7/401675253.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/degonefadu.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/rorakureromaz.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/99587751513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=express+vpn+latest+modPDF 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_off0000cdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5ED 10612 bytes
SHA-256: b36645c5431a2f0ab512c9c5909c0f2c723225f085951392878f01f82869ae44
font_02_sfnt_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 17692 bytes
SHA-256: 0aa97c4f913d41845cf072e15dae30a1b4c605cec3e0095a2b379381cff69e9a