Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b763b5a8eed813…

MALICIOUS

PDF

69.7 KB Created: 2021-02-11 05:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9a231151b2c7d83035bf35189464bc43 SHA-1: 50d9a81d65d7bcc798bf54aa1c70f2cd9d6eec46 SHA-256: 93b763b5a8eed81306994fdb41aac053a584ad11d1a0799bcf1444641365991b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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 https://jacksth.ru/123?utm_term=ratios+and+proportional+relationships+word+problems PDF link annotation
    • https://cdn.sqhk.co/dosojegomugu/gjihgi4/aaron_donald_jersey.pdfIn PDF document text
    • http://hihikane.space/74069045214es03v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369631/normal_5fe0ed7807a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426416/normal_60238bac0ccfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369143/normal_60029b38bb084.pdfIn PDF document text
    • http://hurleyshamburgers.com/clinical_cardiology_made_ridiculousl9npxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459329/normal_5fde0b586f2cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_601e25783ef31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415525/normal_6015d0c50afbf.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/eihzsQP/sagenu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417206/normal_5fd05403d4a94.pdfIn PDF document text
    • https://cdn.sqhk.co/texirova/dEgdUgj/putabeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_601dc58ee25df.pdfIn PDF document text
    • http://mnclassis.org/performance_appraisal_checklist_templateifl51.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/ha9qkjh/mokodugu.pdfIn PDF document text
    • https://cdn.sqhk.co/pawijilabu/hcmjj5F/60062592808.pdfIn PDF document text
    • http://itagreen.fun/sears_kenmore_sewing_machine_manuals2c846.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/jZpgghd/deboxow.pdfIn PDF document text
    • http://adyga.site/loan_calculation_sheet_excelmokhx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F5 5440 bytes
SHA-256: e08b84d18c8069c83cc5807ecdcd533a5a05be7c7e0f30e79a864b18856fb548
font_01_sfnt_off0000e358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE358 11140 bytes
SHA-256: 5b84512944d59ed8c38f6dfd1e95fd7825c90dc6f919440546e0c694a30394d0

Open this report in the interactive analyzer, or submit your own file for analysis.