Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9ace168bfee53c…

MALICIOUS

PDF

68.9 KB Created: 2021-01-18 19:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1457de42fc410063ec71c4b78ef3aa22 SHA-1: 58adbab23de3c3cc281e85e2963132914a6229e2 SHA-256: ce9ace168bfee53c53da19c155ecaab80ac93d134d86079658bbbe737dc1ae79
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure as a link farm on disposable hosting suggests it's designed to distribute malicious content or phish users.

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 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.
  • 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://traffmen.ru/wb?keyword=gold%20mountain%20omaha%20ne In PDF document text
    • https://cdn.sqhk.co/nuxezitowefi/dfT5haz/battle_royale_3d_warrior63_63_apk_download_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/pusobatosip/gQhfigs/guide_and_diamonds_for_ff_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_5f8de5b15dcf3.pdfIn PDF document text
    • http://rewuvov.iblogger.org/bridgeport_connecticut_weather_report.pdfIn PDF document text
    • https://zexivuwesime.weebly.com/uploads/1/3/4/3/134356920/mugodeje_xiwuku.pdfIn PDF document text
    • https://pudijeda.weebly.com/uploads/1/3/4/5/134586696/sagenikutex.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/Njb8gd5/29469358787.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/pegujuboputokiro.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/ihjhXjd/sports_live_tv_hd_streaming_app.pdfIn PDF document text
    • https://luzoxunijasuw.weebly.com/uploads/1/3/4/3/134338954/5940937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_5fb9454933d73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468286/normal_5fc3d37c5d0e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bozudob.epizy.com/adjacent_angles_worksheet_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/72828743649.pdfIn PDF document text
    • http://notalopelovawu.epizy.com/60341183157.pdfIn PDF document text
    • http://nanisoz.epizy.com/28586961343.pdfIn PDF document text
    • http://wesonujojamoga.epizy.com/2018_dinghy_towing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/64798500781.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/ring_of_crescent_guardian_failstacks.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/22454807081.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_off0000d277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD277 4820 bytes
SHA-256: 10cfa3f30d668d2486788c24b8c387820b9c9a0cc635b2a8eee0c1741ec2423a
font_01_sfnt_off0000e2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B0 10332 bytes
SHA-256: fde097bfcf8f31545fea7326678a41ca7b8bc703b10229e1e15577ccdb96a845

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