Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbbedc8b60a6cca…

MALICIOUS

PDF

73.5 KB Created: 2021-09-19 02:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bdabd8aa030ecfe239882aaf52564b64 SHA-1: c6880a832c22cac99171e9a0c1afd1f41fe2e6f6 SHA-256: 1bbbedc8b60a6cca03ff74497c838d4f51b551bcd9edb530a27b0ecda8887003
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external sites, a common tactic for phishing or distributing malicious payloads. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4179

Heuristics 4

  • 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
  • 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://wastran.ru/uplcv?utm_term=thunder+vpn+apk+download+for+pc PDF link annotation
    • http://besteva.com/upload/files/bowawaw.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/04fe012ea072b425bac5ac0ec68f6587/86759255666.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/30321593458.pdfIn PDF document text
    • http://asfalon.com/__files/file/18303701749.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/89013130267.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109152236562440.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/tagilerafef.pdfIn PDF document text
    • http://195exim.com/datas/files/51154078280.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/bifetiviwiw.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/6349431118.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/16186096090.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/25743186172.pdfIn PDF document text
    • http://wakabaeducation.com/userfiles/file/85845435571.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/22715765437.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/9919868537.pdfIn PDF document text
    • https://karthikaspices.com/uploads/file/wobate.pdfIn PDF document text
    • http://xahuaheng.cn/userfiles/file/48392899653.pdfIn PDF document text
    • https://noelex22.org/userfiles/file/40700285637.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/55284475298.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416fb8750dd---jusodu.pdfIn PDF document text
    • http://anpo.vn/upload/files/28592455861.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/dofaruxekuranugutibusej.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/12800934385.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/74609749834.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD885 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09C 10668 bytes
SHA-256: 3c0a6fec215472766953524554a2e26c777e58774e0d002e739b80d879c1c83f

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