Malicious PDF — malware analysis report

Static analysis result for SHA-256 08adfa2e84496ab9…

MALICIOUS

PDF

84.4 KB Created: 2021-06-23 23:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1b1350423ce2eb140c93782a10a3841d SHA-1: 28f4a904142e9701b259150428335619e79ce4c1 SHA-256: 08adfa2e84496ab9389502431b3b4f6bcb4af2e1e347e4e10aebf9a2f221f38e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://angelescare.com/userfiles/file/debowirugiw.pdf In PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/b7542a40df39b12e3afb836a3dd667f1/37972128304.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/69650451925.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/xefemusam.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/ad55e1405dd881ab3fa538fa48132fe8/sajizonoposesoxewewo.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/87548299109.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/jepuretipubalap.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/pefega.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210512125537_1920629210.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/8773024a76b77cbd6b3084e6f2cda47e/wonavarabipiragober.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/vonamo.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/eb4401807cf96a04cfd84a8d095315d9/ralurututedepozipifugule.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/xaxofefinomusevule.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/93927598185.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7b49ad9f---jisoxiniwovebuxiwox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=oracle+tutorials+for+beginners+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9A 5492 bytes
SHA-256: 54d882864b01505d0f4e0d71271b513ac906c1c38347d7e898d5e740384ddf89
font_01_sfnt_off00011d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D45 11552 bytes
SHA-256: 5edfa54624ae643ab76b5e6b1a2a2a0e70e0abb7edb4ba016bef46bbcfa3862f

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