Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a79ca0ed14abc5…

MALICIOUS

PDF

82.0 KB Created: 2021-09-12 18:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 02644fc163f3ba09da1ab8dd2c644179 SHA-1: 1601873cbc05119527f80d0c0b401882c5147dba SHA-256: 66a79ca0ed14abc5d243d2f0345decf8b2a9abab4e7d3bfec794d0fba5b749d8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains or are used in link farms, suggesting a phishing or redirection scheme. The PDF structure and the presence of external URIs are consistent with techniques used to deliver malicious content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://datajournonepal.org/files/rajabimixo.pdf In PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/37391094312.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/jawinisesepixu.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/tenugikodajojo.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/fovetalokenatugabegax.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311d1508570---45653466383.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/3528634f70c0a08459b58687022ac836/tupev.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/zunurewovetawuvororixujep.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/90168747494.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/42921869243.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/rikuwatixewuk.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-9-2/20210902070448542641.pdfIn PDF document text
    • http://anm-av.de/uploads/files/wafadosu.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/vaxutifidafilabi.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/gomowinafisatijulep.pdfIn PDF document text
    • https://papiratisk.cz/soubory/labixixugujezuzeditiwifan.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/72908976126.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/votulakako.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/66092611052.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/pafeviw.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/bumiburejidonavubelazo.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/bilegekotimike.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=android+film+editorPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/17871558291.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_off0000df10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF10 10164 bytes
SHA-256: de8e7be198b5ce5779d6a051b3e380670cc91aaa505155c90e2f3d6d5fb6e625
font_01_sfnt_off0000f5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 17432 bytes
SHA-256: cc8c8dba230fa338a07145efb18e72f207a308bfbdd986fb9ee1542b82ef9207

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