Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0e93b6b26aa8bc…

MALICIOUS

PDF

94.9 KB Created: 2021-09-12 11:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f5a037848ba225754d5da17eb5599e91 SHA-1: ca1d8c1a03d7ba1166ceb4c4e4605a6d77e3f99d SHA-256: 9e0e93b6b26aa8bcde5122cf96eb10a76a9013c7aa69ec35f1a94a4b883c717f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed for redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nct-vn.com/userfiles/file/55119572085.pdf In PDF document text
    • http://finproekt-msk.ru/userfiles/file/fidakozig.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/e1169ab96c075f07a25c049697149b4f/mewegoximevogolirovubel.pdfIn PDF document text
    • http://pharmorgsyn.com/upload/files/26092470977.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/67700113853.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/0ffb850d96be902e0567a6bca047affe/25833282943.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/63678043442.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/lawelenepuna.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/maduxajeta.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/74480985797.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/boweropodepaduxegek.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/94859204457.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/59682622442.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/d13b8f22825a05a83b8c6b12127d9885/87590324385.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210905_D5062D8635D79E09.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/pagikafifitifadimezurego.pdfIn PDF document text
    • https://olterus.org/contents/files/mawemipirud.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/duvakigijofidudigumozig.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/31372725388.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/31411049225.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/pjms99vnnepqba0umpac6b9785/fiwisekidefop.pdfIn PDF document text
    • http://platcometals.com/images/file/82216323658.pdfIn PDF document text
    • https://digiconelectronics.com/media/jasetuzibagifigozozilotu.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/tabulanawuti.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/99710771787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+high+2+putlockerPDF 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_off00010899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10899 10608 bytes
SHA-256: 00372e60fbac4053e0add139c9ac7a16b9ed7febac0b0404088e3c077d38260c
font_01_sfnt_off0001210f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13921 20052 bytes
SHA-256: a50ff414fd59bc709832114bc8507e8ae27dae7563712f6eddaa9cb7f2f6d31a

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