Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97ff2275b94e5f8…

MALICIOUS

PDF

87.4 KB Created: 2021-10-12 04:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 76172df2041980aeb7709aa0984afa33 SHA-1: 4c60e452e26112677e8f5106e7ce83603c8ec0d6 SHA-256: c97ff2275b94e5f8136fa3287e3494dc3e02da045c5db08e18a566d41f9728d3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to what appears to be a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests an intent to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://hydratrend.com/application/third_party/ckfinder/userfiles/files/suzivozixavakivema.pdf In PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/92106219049.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/sekebikowunixodoladapez.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161305fa8c303c---76026426993.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/61442818382.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/90682696374.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/vedatixi.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/suzivotidew.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141ac052b77a---38428317828.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/gakalugeti.pdfIn PDF document text
    • https://onlinendttraining.net/files/29699575921.pdfIn PDF document text
    • http://signauction.net/userfiles/file/dobizefafuj.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/1250409139.pdfIn PDF document text
    • https://journalofcritique.com/ckdosyalari/upload/files/66313171632.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/61286044789.pdfIn PDF document text
    • http://dgkno.cn/upload/dimivax.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210912120459342.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/gabep.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/wumosez.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/83540542809.pdfIn PDF document text
    • http://dsagco.com/Upload/file/45106939350.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/ximodilakadivokevaropej.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/xixira.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/92625341088.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/23D8k0Ec_6w/uplcv?utm_term=using+z+tablesPDF 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_off0000f104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF104 18756 bytes
SHA-256: e7d64a4e5ea7bfc99f43f7d473df15e3175d0d88c3ca3675e8bda2a78ae42b1d
font_01_sfnt_off000120c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C2 10268 bytes
SHA-256: 1464196e0c3374d5f02ce7563009c99328c0bfc33350618624214913dfa9085d
font_02_sfnt_off0001380a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.