Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7493ea2c55e568…

MALICIOUS

PDF

81.2 KB Created: 2021-09-16 12:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fe6e7d60462d04df01e2e74cf4315a13 SHA-1: 0682cd91607b8d9ed12e59be8ea319f9eb45345a SHA-256: ed7493ea2c55e568f8646db758e0c44a5724d4c2c1a082b988245fb49586d506
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous suspicious URLs found in the document, aiming to deliver a phishing page or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://quangcaosmsgiare.com/media/ftp/file/kodudizadogu.pdf In PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/28799078114.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/xubanimorule.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/mb3drv8s2r3q7ds87o0emedsa6/15531223889.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/zomulavok.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/dajewamudaduzipun.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210916155019.pdfIn PDF document text
    • http://chinahongji.com/d/files/15005148912.pdfIn PDF document text
    • http://zamgph.com/uploads/file/011307529686.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/xejililejebulemodip.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/xodisozazetunemepi.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/jinezemikuta.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/48464483780.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/pukesolerad.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109010224494631.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/81907500299.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/bugufoziwavenenijone.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/6344d3589a1172df2fbcc61cbdc7bd38/rilixug.pdfIn PDF document text
    • http://watchimport.eu/userfiles/file/defulajenetavaw.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/10763771856.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/tenopuxulejug.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/ditakonilojejisenir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=omegle+video+call+on+iphonePDF 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_off0000dad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD5 10688 bytes
SHA-256: eb13fa4fb3e92d2b2183e9fe30ac3a0ee3bab1efbe27944fe31e5ec24c0cf53a
font_01_sfnt_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 17300 bytes
SHA-256: a77454e4b4680f6e68e64a541cea63c4ccb5a54f1162be57d80f9dea353accdf
font_02_sfnt_off00011f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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