Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fe67476b40bde9…

MALICIOUS

PDF

76.5 KB Created: 2021-09-14 11:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ce1ac16aff6bf4a79f74e5ee07cf7a8e SHA-1: e1add6e879fcce8ce910c08884a41c0910d609bd SHA-256: 07fe67476b40bde9989fe597cee3002b90ed070ed2af4cb481127810900a5d72
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. It also includes numerous URLs, many of which are associated with link farms and disposable hosting, suggesting a phishing or credential harvesting attempt. The heuristic 'SE_QR_LURE' indicates the document instructs the user to scan a QR code, a common tactic for directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://officeharbor.com/pdtInfo/welinokuvofovefud.pdf In PDF document text
    • https://12waktu.com/contents/files/kotog.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/dekotakosutakamefag.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/20822178980.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/99689481058.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/kapawitusuzoziz.pdfIn PDF document text
    • https://dtd.com.pk/ckfinder/userfiles/files/82306279100.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/18131995980.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/xawudosemezulikejoropajo.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/sosisuvelu.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/kepupukasedikilelugate.pdfIn PDF document text
    • http://dataprint.ie/uploads/file/99831533183.pdfIn PDF document text
    • https://premiersuli.hu/files/files/rafemo.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/vebawefipunijomasafarewof.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/fejalofinoxefinosinakulos.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210908172901.pdfIn PDF document text
    • http://vongtaygiay.net/media/ftp/file/88746790151.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/sitoponirupewogigefibut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+can+i+scan+a+qr+code+with+my+androidPDF 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_off0000c5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C3 17556 bytes
SHA-256: 08ca7ff7042832eda48565ee20ee4cb690c7b3851b79b2515f28341d334641e0
font_01_sfnt_off0000f362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 10928 bytes
SHA-256: 2a8577f4a116869e6df7cf90c6b1cda22a002c9314f773c34cb990ac086a1dc3

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