Malicious PDF — malware analysis report

Static analysis result for SHA-256 3669d6abba9a0d50…

MALICIOUS

PDF

75.4 KB Created: 2021-10-07 07:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5e44006b4134a1a6f16a6b6f0217a46a SHA-1: 7b1a9510e543fe45dee0e13ce027af1c43d70479 SHA-256: 3669d6abba9a0d50803cfbabe6ba59ee5b015b667efd213151b1876ada599b96
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The PDF structure and embedded URIs suggest an attempt to lure users to external sites, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=geographical+thought+by+majid+husain+pdf PDF link annotation
    • http://iccjsc.com/images/uploads/files/jujewewodepatunodofagin.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/bilig.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/tujupobixufawibas.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/5476935970.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/jalivizilo.pdfIn PDF document text
    • http://lg-palette.com/upload/files/xoripugifaduseb.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/8565761652.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/bebarukakiwuvoxeriv.pdfIn PDF document text
    • http://mobilenmr.com/files/files/buzudejadoliwonu.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/25140390488.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/80525090193.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/xejulamokijosinosujule.pdfIn PDF document text
    • http://estatepie.com/files/userfiles/file/28379094926.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614047547fbe5---zijopamizebilefubimulalax.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202109042234424501.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/jominubogoxepodopitagomax.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/42095562711.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/zolewenokore.pdfIn PDF document text
    • http://bodamvientin.com/uploads/userfiles/file/keraxevukagut.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/55777190307.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/30386247844.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/vorirelesabebajepu.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_off0000bde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE1 11588 bytes
SHA-256: 4d8dd4d5190b012645fe35966d9ec96fe8b14f2a5330bb53f1d517a300e298b9
font_01_sfnt_off0000d8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CA 17768 bytes
SHA-256: 6c64baf2475b7dadf308da2aacd2af67304f8ca6b3231d928453045c865efc48
font_02_sfnt_off00010789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10789 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.