Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6883ffd0950f093…

MALICIOUS

PDF

70.4 KB Created: 2021-02-19 03:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2a0d039765984eb5aeca5d5d35ea52a1 SHA-1: 93d27d96b2d4233c483f55c98d10dc6dbc999084 SHA-256: b6883ffd0950f093158ab6b719fe2affb5c682acad73dc9ec7fe3d5553960894
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external URLs, particularly the one pointing to maypoin.ru, suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

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 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://maypoin.ru/aws?utm_term=un+oso+y+un+amor+personajes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407062/normal_60065112da0aa.pdfIn PDF document text
    • http://zewegirugiputix.22web.org/24156895436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_602c530ceb937.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470699/normal_5ffdd1d15c5f5.pdfIn PDF document text
    • http://vadememejunozax.iblogger.org/83683890950.pdfIn PDF document text
    • http://smcjd.com/guwodewigo9x2t8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409602/normal_60048455a6ea2.pdfIn PDF document text
    • https://vevatujiv.weebly.com/uploads/1/3/1/4/131482893/5655207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493195/normal_5fdb37f481216.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/govisaf.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/76102802686.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/sultans_of_swing_drum_sheet_music.pdfIn PDF document text
    • http://relogevavikidid.epizy.com/komitafavoke.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/wefapuwuzabuninigiwad.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/best_free_android_oscilloscope_app.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/gekasolefedajuzobu.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/2400851809.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_off0000d60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60C 5100 bytes
SHA-256: e1f6cafbd7ddf77554e68c58d6faf418840a448d09be9066314e3bb0cc722e1b
font_01_sfnt_off0000e75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75C 11064 bytes
SHA-256: bcb50e3466f437c7daec00da4af23de72ac18e974838c5d85492d2a8fea6a7be

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