Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf02de47025848d…

MALICIOUS

PDF

74.3 KB Created: 2021-09-23 00:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a0735ba04cc5397d74f49f16f294f1e0 SHA-1: f94ef6f0a19d8013a4abecbd38c8883e17fd2f49 SHA-256: dbf02de47025848d43054057c6de5dac656957aa02a37ef2aff452c3deebf786
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and embedded URLs point towards a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://gfzgt.ch/upload/file/22469375520.pdf In PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/lafir.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/61132561588.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/disaxogonijupotif.pdfIn PDF document text
    • http://okvin.org/userfiles/file/zegilorojisigajelababovi.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/89655107259.pdfIn PDF document text
    • http://bakoca.hu/files/file/90533501082.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/93258478609.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/76060159842.pdfIn PDF document text
    • http://www.heatandgas.com/EditorImages/file/mobinibe.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/beziwixefa.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/73582504580.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/324237ba3b9a7c5a0037a6c30fe24de5/vovebeporezemikavavaxegu.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210919163201043039.pdfIn PDF document text
    • https://anup.bo/images/files/jevofilolonadobuboje.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/65411160799.pdfIn PDF document text
    • http://spiregene.com/image/files/20210906_111508.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/45958760951.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/10129117887.pdfIn PDF document text
    • https://talaa-obour.net/webmisr/uploadwebmisr/file/rivanekeluvipelid.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b12900a11e---moperimitelafepogadugiz.pdfIn PDF document text
    • http://uteambio.com/upload/files/94326946311.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pokemon+ruby+zip+filePDF link annotation
    • 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_off0000beb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB1 17576 bytes
SHA-256: 91fc68fcde7b66e336fbf8a164feb58e9066af56d233ecf1e8b85e4941cb36f9
font_01_sfnt_off0000ebf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001040a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040A 10596 bytes
SHA-256: ee17abc12c3cd4106bbe4102d18bd0fd6b900741c424c3a1b8671ddec8ba26b4

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