Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf960a857f96f8f…

MALICIOUS

PDF

104.1 KB Created: 2021-05-08 20:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6d8e65ea934a13e56b908c7c95340f33 SHA-1: 809646a29223d3b4698d10ba5dc83b20ff439266 SHA-256: baf960a857f96f8fbdf0a9e4ce16def64130ecb910e6fc37bf99a68bd537a68c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=what+is+erik+erikson+famous+for PDF link annotation
    • http://meinekarten.best/3460381532057hmy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5fd6e07a6ca4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481161/normal_6029393296f2f.pdfIn PDF document text
    • https://xevosafodom.weebly.com/uploads/1/3/4/7/134739965/6e5b50e81993.pdfIn PDF document text
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/momelapabupebi.pdfIn PDF document text
    • http://jidojagijubu.iblogger.org/93918489520.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/pusutononenet1er76.pdfIn PDF document text
    • http://sodalabs.club/warren_wiersbe_commentary_on_hebrewsylrwz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivuxo/xagerukokigibekudukarixe.pdfIn PDF document text
    • http://bivezekamolekaz.rf.gd/novejubuxanibidejedipamo.pdfIn PDF document text
    • http://winuzuvejifod.epizy.com/chrome_apk_from_google_play.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/gdi32._dll_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cec9514-5415-4510-939d-315bfde4a7ac/piwiwemegi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/fovizizelo.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/82178500983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/131f3b3e-50ba-4caa-bf73-5e546b359753/dns-323_manual_espaol.pdfIn PDF document text
    • http://givorajosi.rf.gd/16065230564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43b2373-2dc3-4cc2-b339-e14557af5fcb/how_to_become_a_guardian_ad_litem_in_michigan.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_off00015bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BBC 5052 bytes
SHA-256: c47d9656e0f86dca2dcf60e0e0133cf96cdb1da49ac5d9f78a93b297693b942e
font_01_sfnt_off00016ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CCB 11152 bytes
SHA-256: 7fa515f1091d8bcdc8e0659548ca56d9eafdcf974f4bd7f243abc9fbf581e469

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