Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ad714f3168a298…

MALICIOUS

PDF

80.4 KB Created: 2021-09-18 02:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c1be40035e900a18c612888b0ccc00d5 SHA-1: 34b5470cea8a857bbacfd7a60fab3befd69fff91 SHA-256: e1ad714f3168a298851cdc22dcd2fb4ca1f7d4d5a84106d58573eb4b95e4f263
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by an ML classifier as malicious with high confidence. It contains numerous embedded URLs, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicating a large number of links spread across many domains, a common tactic for distributing malicious content or conducting phishing. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 4

  • 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://perfect-gallery.com/userfiles/file/80472888083.pdf In PDF document text
    • https://beautifulhairstore.com/upload/files/levikejenajak.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/529310b1a2fef6a6a59e42181bd3761a/49274761475.pdfIn PDF document text
    • http://www.seminariomenorvalencia.com/admin/lib/ckfinder/userfiles/files/47133526933.pdfIn PDF document text
    • http://metabolizmusonline.hu/images/upload/file/nixavijimeluvovur.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/wixevabemipugezogusoxa.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///wudemokeribopofigo.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/1331025162.pdfIn PDF document text
    • http://bulmarconsult.com/files/wagifatanebaroxomerez.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/roverosedavozip.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/jezavak.pdfIn PDF document text
    • http://pjteam.hu/uploads/zafinutubukotokilezo.pdfIn PDF document text
    • http://familie-schiecke.de/images/file/vutosaxosoramoxovebebufaz.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/82969016480.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/noresawobivuneki.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/fubusoporuxal.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/87770743176.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/22359398170.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/vaburakuba.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/24351808986.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/nemepaxafonitijoluxu.pdfIn PDF document text
    • http://mp-journal.com/media/file/rerape.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/vitojubokekikenibosozafe.pdfIn PDF document text
    • http://wine-paraphernalia.com/files/winep/_repo/file/sokivepabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=the+kabbalah+unveiled+pdfPDF 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_off0000d09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 10472 bytes
SHA-256: f8cda0c7645a13fa4a29fb1cf9b7607ad111a9b11dc00c35f032f9584e96f344
font_02_sfnt_off0001001c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001C 19552 bytes
SHA-256: 1d7ee7b26ba3cf7bd730ffb65cfdb36a7db9463fa965827810fc1db894d955a7

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