Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c26ff1df4860680…

MALICIOUS

PDF

70.2 KB Created: 2020-11-20 13:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a0f61f16e5618fe486580f31cdade21f SHA-1: d77790aeca484b7e3b59219d675ecab9a135f59c SHA-256: 9c26ff1df4860680b05c6979cca20c0735b470c8041fb47adc57895901cb47e4
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gettraff.ru/123?utm_term=conservation+of+energy+problems+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_5fb54f20d7050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464739/normal_5fa786b875eac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406241/normal_5fb757c192f8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403406/normal_5f98fe8cee1e5.pdfIn PDF document text
    • https://majizozu.weebly.com/uploads/1/3/4/5/134598595/2828b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f8b65e738e95.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/36f8eddb-5b8b-4eac-b03d-bfd7063e701c/nuropivoluzuwegerivuge.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/types_of_food_and_beverage_service.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/white_lucky_block_mod_1.7.10.pdfIn PDF document text
    • https://s3.amazonaws.com/gonuxiwela/basudufat.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/aidin_salih_gerek_tp_yitik_ifann_izinde_indir.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_off0000d212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD212 5584 bytes
SHA-256: 87d2bb4e8da42f7f6fb521a42ea57327fe5138cdf380ce06870407367a8f2304
font_01_sfnt_off0000e51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 11516 bytes
SHA-256: ca2c3eeb831f76943ff0db6a2b39e49cccc5d7af37aa7334e319dfee7f70544c