Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d76d4ff7647a09d…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 14:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 401a76bba14ae0402d1e1d3af465e517 SHA-1: be5d0d1e53bb63bd5fd1022f2a7a9b38f78f8f28 SHA-256: 0d76d4ff7647a09d240adc2a74d02c9828ba88ec1a930facff7cec11f2f462c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The primary attack pattern involves luring users to external sites via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://garglob.ru/uplcv?utm_term=idm+key+2020 PDF link annotation
    • http://architects-desk.com/uploadsfile/puzusopuzivotulibaravi.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/xakafitivesikovobu.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/taduwenige.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/4246158094.pdfIn PDF document text
    • http://dierenwinkelindex.nl/images/uploads/30550251988.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/41831576138.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/43497683095.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/newavikefe.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/27119061871.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/jozamipemofifipa.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/wutimuwunofotowowizetigug.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/vefodereraza.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/70806250838.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/98333629521.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/27780046380.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/26260903444.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356eaa8cce9---49053230762.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/39972418287.pdfIn PDF document text
    • http://abwva.com/uploads/files/15965256640.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/59633235922.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1631193085.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/49305286894.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/seribudolosatawa.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_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 17288 bytes
SHA-256: 940a24378450aa05b483205c614e7b24c641a52c76f925467cc9880b886257b5
font_01_sfnt_off000107f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001200e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200E 9920 bytes
SHA-256: 146d311ca8c968c9a5221dcbfdcad9e204a9326850deb380c6948509c5172853

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