Malicious PDF — malware analysis report

Static analysis result for SHA-256 0240d8d2fdab8d3e…

MALICIOUS

PDF

73.2 KB Created: 2021-09-25 07:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f769caa169009fdc61d0085a8ea4028 SHA-1: e572f9e6ec7010ba9b7fbfeebbadeb1bad5ceaa9 SHA-256: 0240d8d2fdab8d3ec0afe70c8071c3bcb4abcbfb9a7ee75435ce4d04d884a52a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external PDF files, indicating a link farm or redirection mechanism. The PDF's structure and the presence of external links suggest it is used as a lure, likely for phishing or to download further 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 http://ymjgolf.com/file_media/file_image/file/mapugod.pdf In PDF document text
    • https://parklanehotel.asia/userfiles/file/97984383835.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/totopiwifilonu.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/89379031582.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/terekalokajukaxuromanodu.pdfIn PDF document text
    • https://belretail.by/ckfinder/userfiles/files/zugiliwilab.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/162090284.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/kim71okblruj38etkig2dllb97/letagodo.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/musitodivivuvubenutoza.pdfIn PDF document text
    • http://fourfoods.com/images/files/monesawu.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/zugem.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/81600887693.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/79814998008.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/fubuzedugilekuguwavijakin.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/72d681d71b33e6773c13f9823f616fec/ziloxomavafusatexi.pdfIn PDF document text
    • http://ladna.pl/user_images/file/mitizixurilubuf.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/12107871164.pdfIn PDF document text
    • http://benjapakee.net/UserFiles/File/53969124325.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/34137319912.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/11323658185.pdfIn PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109201817340694.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/funoduvisog.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/68411118293.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/xurozivopesufavidunowev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=free+comment+likes+instagramPDF 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_off0000b6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB9 10644 bytes
SHA-256: c3a96a3f4fb1f97264eeb947b7c2e23b709b74d12810adb20141388242eb20a1
font_02_sfnt_off0000e70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70F 18792 bytes
SHA-256: a30318979dc91725783d774ca136d820c5ca3715c929a85997a5b8b91956468b

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