Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a06f41968d0dd12…

MALICIOUS

PDF

70.3 KB Created: 2021-10-09 07:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 458d939b99da619bd041ba04f4064317 SHA-1: 7f517843125b8d2326dba77394213de6a7f0c327 SHA-256: 7a06f41968d0dd125697a7b1cf7eb6d43c6997828058f05a1e04191ea866f405
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to PDFs hosted on potentially compromised websites, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support the conclusion that this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613639d9c3062---vevunuwegibuves.pdf In PDF document text
    • http://vipforiraq.com/userfiles/files/tininivimebubo.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/33899477107.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/tukorusiradojo.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/zudekapiravewam.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613003102b747---831632397.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/fukuvekiteluwi.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/fedugaxo.pdfIn PDF document text
    • https://debo-fit.be/userfiles/file///67660221711.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/89882854806.pdfIn PDF document text
    • http://dd-eng.com/files/files/widasonol.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/jujibamusatazufelopunelil.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/8041288725.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e8300548a2---bajipika.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/68543913505.pdfIn PDF document text
    • http://anindecor.pl/files/file/66941579842.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/30786195637.pdfIn PDF document text
    • http://fullx.net/files/22438939013.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/genewaxiki.pdfIn PDF document text
    • http://xfswchem.com/upload/files/dosujanemasi.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/82240693625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=taxi+cabs+by+mePDF 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_off0000b06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06B 16944 bytes
SHA-256: 40082c79f5d00b42ee59c5f9d208ce7444ef020aa6b75c9af1896c11148471f1
font_01_sfnt_off0000dbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEC 10244 bytes
SHA-256: b3624ff9819490166569ab152e655b16d923083ea46b80f8827c8863fe05aa13
font_02_sfnt_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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