Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee044e2d7edd0a4…

MALICIOUS

PDF

69.3 KB Created: 2021-09-26 13:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 70c05f15e3af641dcf754362dcadf635 SHA-1: d9b613265528c1cfc8bcad2621dc4d658a8b9486 SHA-256: bee044e2d7edd0a441c2977fa94c349bfffaef216e1c12ae5875213c703b0714
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many of which are on disposable or low-reputation domains, suggests a link farm designed to redirect users to potentially malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically points to this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://huntic.ru/uplcv?utm_term=tom+and+jerry+and+the+wizard+of+oz PDF link annotation
    • http://aapltd.net/userfiles/file/jakezupebujovidawulur.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/xuberopinuxumilog.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210924_155834.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/xagotazupuwa.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613451a45801c---mowetiwem.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://abwlondonblvd.com/uploads/files/18262958800.pdfIn PDF document text
    • https://amoslodge10-org.alljobsinliberia.com/ckfinder/userfiles/files/31190704571.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/kinaf.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/41017543000.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210924090308.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/mipufoxoziwatuxaxujewuxav.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/48893374120.pdfIn PDF document text
    • https://borsalino.ro/imagini_ws/judatukorixawarupimarik.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/diwoma.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16149ac2f0701d---gitoj.pdfIn PDF document text
    • https://zzhqhi.com/d/files/lofexasa.pdfIn PDF document text
    • http://trivio.it/userfiles/files/legoxagisoseso.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/temifitesipozalegapolate.pdfIn PDF document text
    • http://pmke.cz/pictures/files/revepivesize.pdfIn PDF document text
    • http://arablift.net/userfiles/file/97237996602.pdfIn PDF document text
    • http://ogcdc.org/uploads/ck_upload/files/24100082277.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_off0000af9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B1 10760 bytes
SHA-256: 282c7b04412d39d1b69059e862a8e10cd34ba9a2a7138f1d9f78e5ae8b582710
font_02_sfnt_off0000e04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04C 15532 bytes
SHA-256: b9f1f3cd4b5d7f4513e27d977c0a66b1fcdf2926fc8cc4e697dcbf8d199f59b4

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