Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ec41872e805c15…

MALICIOUS

PDF

82.6 KB Created: 2021-03-01 10:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7c55b09adbbf237f585d4527a58212f1 SHA-1: a2074a1ff6d063526db96dcf883c15ebd6ef2d44 SHA-256: 00ec41872e805c15dc878ba92b96a93a6c537b5b86b976ba9a84742d6b23f8dc
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to search terms, suggesting a phishing or scam attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

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
  • 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://gimoguvi.ru/wix?keyword=cell+structure+and+function+section+2+review+answers PDF link annotation
    • http://delinapod.mypressonline.com/libro_de_ingles_basico_para_nios_de_primaria.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/2niabid/63193235829.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/xbox_live_fehler_8015d002.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/fBigjfm/48524704519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471948/normal_600b1c9b55d73.pdfIn PDF document text
    • https://ripaduwik.weebly.com/uploads/1/3/5/3/135311581/wesatetorezox.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/firajakilufutop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489244/normal_5fc890302099c.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/raymond_carver_poems_beloved.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/nWWiaij/spike_jones_city_slickers_youtube.pdfIn PDF document text
    • https://naxomusiji.weebly.com/uploads/1/3/1/6/131606859/c5e294d17c4fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454990/normal_5fd1649c539e1.pdfIn PDF document text
    • http://komamoj.22web.org/asymptomatic_hyperparathyroidism_guidelines_2014.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/rhiBidH/dinoland_cafe_myrtle_beach_menu.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/rule_12b-1_plan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://surewefuwiba.rf.gd/giwujedadavi.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/38303564143.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/sulufowusumopaxim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA15 5204 bytes
SHA-256: 9a2b5a0fafcd98ab400d517650acc32f9625a6801b642342f55ab403a7529ed8
font_01_sfnt_off00010be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE6 10240 bytes
SHA-256: 0f816ff3f44251788a1e11e8dc028bf8afd052edca8d15ca32a3f1aab8f697f2
font_02_sfnt_off00012ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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