Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f9a344c6f45f88…

MALICIOUS

PDF

77.9 KB Created: 2021-06-13 15:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7eedbd4c671eeaa91b944540fc7d5ab0 SHA-1: 670d5860fca6b7e12ab2ab802c48e53a4ef01d01 SHA-256: a2f9a344c6f45f88b6ea05e786399bc413cc6d59f813c27a778d102a196dcf23
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'wastran.ru', which is likely part of a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and the nature of the embedded URI suggest it's designed to redirect users to a malicious site, potentially for credential harvesting or malware distribution.

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://wastran.ru/pbw?utm_term=30+days+to+better+thinking+and+better+living+through+critical+thinking PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411231/normal_60b7f75f5a38d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_60449714ed893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_603487bc819fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445531/normal_604d0601e1760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_60c0072f08a65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479254/normal_5ffcb7a01e7a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476930/normal_605ab8e66802b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480748/normal_604d0189db6f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c595b9e3-931d-4f09-862f-2ba95ce00168/pukazuxodapoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd200cde-b4aa-4f3a-9644-5ea271a9226d/zesifuwuzosef.pdfIn PDF document text
    • http://sirazumebow.pbworks.com/f/56035092157.pdfIn PDF document text
    • http://podixarutib.pbworks.com/w/file/fetch/144839466/what_happens_when_your_ruling_planet_is_in_retrograde.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ecf107-6674-4534-b239-ad3d925d5d3e/pewimi.pdfIn PDF document text
    • http://fisakujimet.pbworks.com/f/58530366170.pdfIn PDF document text
    • http://dejimebez.pbworks.com/f/twilight_breaking_dawn_part_2_full_movie_free_download_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee00dbf3-8d2e-4fa5-8c93-87b8fd49ae81/pamupinuzoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb306fbf-fd30-41aa-8b06-71da32a44ce1/78409097467.pdfIn PDF document text
    • http://japakekuwita.pbworks.com/f/best_site_to_download_cracked_apk.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23B 5776 bytes
SHA-256: 884e0eef9c8a941a6e012669fdea2010f7da68072a6eb392ffba3af9666fde09
font_01_sfnt_off000105e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E4 10832 bytes
SHA-256: 81bced0cbe156e612a3b7aa9493c600de75884345aff8b2b8e8632835670a080

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