Malicious PDF — malware analysis report

Static analysis result for SHA-256 030c07a52e37a8b9…

MALICIOUS

PDF

80.3 KB Created: 2021-09-12 23:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c39fe6ff95593f38c138b24fb81facdf SHA-1: 61a19b3814c1d9959012133ab72dfa3391942853 SHA-256: 030c07a52e37a8b9d43481db8b96a8719bf9e1089b6e2213b8e92f7b16874063
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many of which are structured as link farms on disposable hosting, suggesting a lure to download further malicious content or engage in phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://pixomot.ru/uplcv?utm_term=gk+publications+ebook+download PDF link annotation
    • http://profil-metall.de/content/uploads/file/82343299882.pdfIn PDF document text
    • http://ccadl.com/files/20210912214937.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/ririzivov.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/xaberupadodovibipivog.pdfIn PDF document text
    • https://negaratoto.com/contents/files/34422917510.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/39296199512.pdfIn PDF document text
    • http://vodova51-53.cz/files/vupekisitasivupenidunis.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/jobajawegur.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/22833870022.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/nurugokuranumepu.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613837be0b9c8---gekuzugumujumugetir.pdfIn PDF document text
    • http://kyea.org/imageuploads/277463518.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/tezesilajoziv.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/64250514506.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/89446079388.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/pobubejelonavum.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/30520431251.pdfIn PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/48002810989.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/32638103189.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/89212721603.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/41750433327.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c6dd8b81375fa21b0fcaff1769281605/baporeg.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/75488771630.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161348ec7c9368---46749503822.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/44764241539.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/43370042210.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/90923967311.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_off0000d0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A8 18880 bytes
SHA-256: d3b04ada213724e418a361044123ab132b82ee191e0719f8058bfad781c53440
font_01_sfnt_off0001009a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009A 10864 bytes
SHA-256: f8e422ec093ef895f6d7356edab7115e27e600dbc8676c52c555d1546dbc9290
font_02_sfnt_off000119b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1