Malicious PDF — malware analysis report

Static analysis result for SHA-256 06eaf2ebf424b869…

MALICIOUS

PDF

81.7 KB Created: 2021-09-19 00:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ee4e490b3ac4399901fb36430a61a81f SHA-1: 7fd034764c5bbcc704bed673bd144ac1a84dd673 SHA-256: 06eaf2ebf424b869881fadb119b48446020e0d20a4dbbdce1d07bdb0d2bffde0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to unknown domains, and is flagged by ML classifiers and ClamAV as malicious. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, suggesting the primary goal is to direct users to potentially malicious external sites. While no scripts were explicitly extracted, the nature of the embedded links and the ML detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://wendi101.com/userfiles/file/76530104818.pdf In PDF document text
    • http://wahluenfty.com/userfiles/38339355850.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/35820254045.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/76811579996.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/9546344844.pdfIn PDF document text
    • https://maviet.vn/upload/files/48546882344.pdfIn PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/82537953878.pdfIn PDF document text
    • https://nada70.org/userfiles/file/49797566287.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/1181413892613bd2d69f33a.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/55873686400.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/83975700645.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/piripumatemeniw.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/zazuxadejo.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a3213fa6f---22954964205.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/6813822575.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/83143597141.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/veramebaj.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161369b46bb785---87398510907.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/82749882624.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/6499749900.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210910012603.pdfIn PDF document text
    • http://starma.pl/files/file/65120276209.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/bekolatun.pdfIn PDF document text
    • https://uudanbury.life/files/file/73430424046.pdfIn PDF document text
    • http://veitali.com/upload/files/diwanilepi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+check+wifi+password+from+androidPDF 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_off0000d8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E8 18024 bytes
SHA-256: e54dfee2d6ad20e70c344903d25ca54f456cb6c002cdaa7de2406f07acee6906
font_01_sfnt_off00010764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10764 11008 bytes
SHA-256: f732f3c461bb0497b9f3de54ba61bc9d41ddfbf4d294065eddfb1059829966b3
font_02_sfnt_off000120d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1