Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f1b727447e58fc…

MALICIOUS

PDF

68.1 KB Created: 2020-12-29 21:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e5d8a01ff2f7a22c358b3e5eff8a2a95 SHA-1: c05a65f13d4ec1b2532aad4575fe229a4c123871 SHA-256: c1f1b727447e58fcc2a8e8213b0576ee39f86e802f06c377e6435dbde0eb12bd
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing or malicious document, including a large number of external links and ML classification flagging it as malicious. The embedded URL 'https://traffset.ru/strik?utm_term=starz+free+preview+on+hulu' suggests a lure related to streaming services. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/strik?utm_term=starz+free+preview+on+hulu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494435/normal_5fbbb296b982d.pdfIn PDF document text
    • https://cdn.sqhk.co/gerukoso/bgjjdVY/sara_cooking_games_online_ice_cream.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473419/normal_5fb8d8549ab3b.pdfIn PDF document text
    • https://tedisizizifem.weebly.com/uploads/1/3/4/2/134235801/bumokomitolip-bomabuxujer.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/950cbbff-412d-4d05-b6c0-6bfdaf042afe/st_elizabeth_hospital_youngstown_ohio_medical_records.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6506316-3768-494d-b3b5-aad29be14710/67279463008.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/ganpati_atharvashirsha_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86aa53ec-4d43-4a37-b33b-7fe0c48890e8/13023120175.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/bifomasuxevudimogifaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75273dd1-874c-4b65-b8b2-f52b6cda2070/ufc_242_stream_free.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_off0000ccc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC9 5116 bytes
SHA-256: f6699eb166643163a5e54bbafad3f3e74625dbd882a9bed45cb9ebf0ad095c42
font_01_sfnt_off0000de4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4B 11048 bytes
SHA-256: 02668ca7ebb09b36b06ef6e98f604efd3cd35dc89cfb54b78efafa074fdcf7be

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