Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0db0e3f592a4a08…

MALICIOUS

PDF

92.3 KB Created: 2021-10-09 14:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9c65196a4bb4e6ac7e120b0f53a21ea5 SHA-1: 0233167bccbadce6b0545061f5ba66964b0aa107 SHA-256: e0db0e3f592a4a08634bb5e91c0b719badd3c378789da5bce9741f8db601ba0b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs that point to external domains, suggesting a link farm designed to redirect users to potentially malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a large number of distinct hosts used for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://krisoc.ru/uplcv?utm_term=tundra+climate+map PDF link annotation
    • https://mayphotocopydogia.com/upload/files/lebexoxuxusaninu.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/rejezutetetoworewaka.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/b65jbsqdb4f3lei5sf9ukk1ofq/xevalu.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/12141752164.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/2274907340.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/zegajavuses.pdfIn PDF document text
    • https://www.netcorp.hu/data/editorfile/wapabugofomudomur.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/64100336962.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/riwiwadutuwonon.pdfIn PDF document text
    • http://schturman.ru/files/files/36142280552.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/52432472478.pdfIn PDF document text
    • https://boulou.mrjean.fr/userfiles/file/65334112400.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/mamuv.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/sonisorirepazisetim.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/35786421478.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/kefifigajesabogelevip.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/61888747518.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/bezamubam.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/xewoxanevejavegoro.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/qhubneg5p5evbon0ds497dijsj/79995619827.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/69910640760.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/kapizowisona.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/kanorojaxomabegib.pdfIn PDF document text
    • http://pasarantogel2.com/contents/files/kiputitawurogezizowotitad.pdfIn PDF document text
    • http://www.ecrivains-consult.fr/easyonline/ckfinder/userfiles/files/jakuverubuvuveduzeke.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_off0000fcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 10448 bytes
SHA-256: 451cfdea819065aad4915d158813f40f85f385320b6cdb23029b676ba8ab469b
font_01_sfnt_off00011475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11475 20916 bytes
SHA-256: f8708f9af99187f24f8c63cc6b3b1363b9822692983c9bf9c1d4017c4f4e05e2
font_02_sfnt_off00014b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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