Malicious PDF — malware analysis report

Static analysis result for SHA-256 324301f04a07956d…

MALICIOUS

PDF

84.8 KB Created: 2021-09-23 01:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8051fb75196358a740d8b7e5788c57a0 SHA-1: 20fbbe727a1934e6bc2ccab6b8c3aaceed95092d SHA-256: 324301f04a07956da4863d901b9da383f4ed49acc9351d76c54277e44c8cd5ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a machine learning model and ClamAV, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically points to the document being a link farm with numerous external URIs, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of many embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://archism.ru/uplcv?utm_term=note+2+sim+card+size PDF link annotation
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f28ab45c7b---vozujudodaj.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/xasolasaxatududox.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/6c2467f0cd0268fbe2d585fc2eb01805/lisidoja.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/8451664595.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/45955466899.pdfIn PDF document text
    • http://sdds.be/userfiles/file/gakitukelasijatadofujaki.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/jokezabifirefap.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/64357913520.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/70419559548.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bupuvazasad.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/xewirugupubitokafa.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/lexafejawajepesibit.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/15349835534.pdfIn PDF document text
    • http://screen.by/images/file/zuxoxetazajogaf.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/41192865720.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/zemeza.pdfIn PDF document text
    • https://toocapen.com/files/46937933473.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/lifeligutumukipupuda.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/8109656370.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/20384703079.pdfIn PDF document text
    • https://xrtradingfeedback.com/cmsimages/file/59812366216.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/23808972829.pdfIn PDF document text
    • http://k1a.ru/images/files/file/75930262272.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/mutagejajerexorobuw.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_off0000e7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 17560 bytes
SHA-256: b1b2db440b2b2b3328ced3321e381d120bd89772f1db92e5bf6314bd1bed5547
font_02_sfnt_off00012d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D74 10536 bytes
SHA-256: c63544db3d25424384605a26e643d9a184918ef3ee587f6067e609287749c51f