Malicious PDF — malware analysis report

Static analysis result for SHA-256 649a0ec7a029a0a5…

MALICIOUS

PDF

79.2 KB Created: 2021-09-18 02:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 78bd7ca23203bae1e062a0aca11e020d SHA-1: f8da9d5d30a1edf8a8f461fd44ff3ea8f52b124a SHA-256: 649a0ec7a029a0a5268511eaa84deb39024aedd6afbf971b3ad3f6a598efe77b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains a link farm with numerous URLs, many of which are hosted on disposable domains, designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • 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.
  • 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://dildendilecevirievi.com/upload/ckfinder/files/36213353613.pdf In PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/mirqqcq2vjosh96v7gn4ncpgqt/81816912911.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/47095168297.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/nilewulakat.pdfIn PDF document text
    • https://equinox-e.com/upload/files/20374785483.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/jajozufigalomilipi.pdfIn PDF document text
    • http://kunbot.com/upload/files/99085724456.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/80175317035.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/rigoralinakidelumabufu.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/sowek.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/74146951295.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/bosigaduganewegeje.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/nugalawutes.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/bokijawikemanaginibo.pdfIn PDF document text
    • https://mfdesign.hu/files/file/66701951171.pdfIn PDF document text
    • http://pasted-radio.de/web/files/vedamenodasunulivu.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/33196559867.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/82114748278.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/77001553747.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/50492890240.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/68493256604.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///88432681622.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/fofolirifitutiwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=motion+wallpaper+for+androidPDF 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_off0000d331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD331 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB43 17452 bytes
SHA-256: 6c0ba2e61be0e5aab3625f4ad13da7ad4f488dceedff8f0f9e08838382088ea1
font_02_sfnt_off000117df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DF 10400 bytes
SHA-256: 9c7a5b87e99f0ad956e42ceee54b72f118ad9069b64d59bc581887ec21e497a4

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