Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead126668be163e5…

MALICIOUS

PDF

76.1 KB Created: 2020-12-19 09:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 05cd799bf54cfd93e7a18b5a2f151fbf SHA-1: 73a92d6900bbc1331fb3a165bd94f872e7c7f8ab SHA-256: ead126668be163e5a3ccfb9c875f230c887176efaf10838a631f70d6a43da381
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The ML classifier and ClamAV also flagged the file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the structure suggests an attempt to redirect users to potentially malicious or spam-related content, aligning with phishing or SEO spam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/strik?utm_term=benton+central+high+school+soccer In PDF document text
    • https://mofivekirupu.weebly.com/uploads/1/3/2/7/132740685/6035796.pdfIn PDF document text
    • https://nutuneronasida.weebly.com/uploads/1/3/4/2/134266022/3b58c6.pdfIn PDF document text
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/8658766.pdfIn PDF document text
    • https://geserani.weebly.com/uploads/1/3/4/3/134347405/buzoletuluwetunis.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/cf2418a3-990a-4cc8-b2a5-01d4a9370d42/rezalimokiwajaxamoluzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02497d13-0ae9-4634-8a08-874d7aad99a2/bob-omb_battlefield_midi.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/whatsapp_diwali_stickers_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d6f868-4e0f-4169-9d6b-1b6d644cee01/football_manager_2019_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/icewind_dale_2.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/3210235134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7862298f-2580-497d-b075-212d18e365b7/viwisebemalak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a88c97f-6d3b-465b-9837-3f653f6a8ad3/9655676560.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_off0000ed0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0D 5108 bytes
SHA-256: 063086727cf4ee69e4f6b329fc3a8165ae04f8788a1fc8e60a19f070163f9e97
font_01_sfnt_off0000fe64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 10968 bytes
SHA-256: a8a72423c3c933201aa8c9a9eef8957f1d2b8c24804db31f4c283eef645d6d6d

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