Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e87cef0b3b18518…

MALICIOUS

PDF

77.7 KB Created: 2021-05-25 18:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7c230c181430762f6e0b356a7eac00a6 SHA-1: dda8116496c402b8736c223825f0e266007a8259 SHA-256: 5e87cef0b3b1851824de98306113f43f8bd8a67c1f31405d4e32693a3c77b916
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=2005+honda+rubicon+parts PDF link annotation
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/73fa118891a4825.pdfIn PDF document text
    • https://zopadujebononi.weebly.com/uploads/1/3/1/3/131380983/9b4fa68b2431b53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413458/normal_605d7f5e7e4c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_60147feff28af.pdfIn PDF document text
    • https://sesirolomozanu.weebly.com/uploads/1/3/2/7/132741009/3166082.pdfIn PDF document text
    • https://jaxuguduju.weebly.com/uploads/1/3/4/4/134442137/369384.pdfIn PDF document text
    • https://lapidarofo.weebly.com/uploads/1/3/0/8/130874394/6857848.pdfIn PDF document text
    • https://vuvitujenus.weebly.com/uploads/1/3/4/3/134305132/lubuzilakodoratefop.pdfIn PDF document text
    • https://tikiruwilowu.weebly.com/uploads/1/3/1/1/131163793/6345817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_6063cba67cb79.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/dikobepibelun/business_strategy_and_the_environment.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/desuxifoxetuseretuvuro.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/jayco_owners_club_queensland.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/centurion_generator_3250_price.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/twilight_saga_hindi_dubbed_download_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a7b63dc-0ef7-47b3-829d-94c89572ab34/which_two_stars_are_most_similar_in_luminosity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f5daf0-fccb-48f5-bcab-ff711f689a4b/introduction_to_biotechnology_4th_edition_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/marriage_anniversary_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c089273-8eb8-4000-a103-508e3515d693/kasifewezegetosotorutu.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/v_for_vendetta_2020_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/78740761993.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_off0000f3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E7 5572 bytes
SHA-256: eef2bea2c4b4e2d40a93732b6e4504c385b2346e5b945045e9c80846712796cb
font_01_sfnt_off000106ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CA 9816 bytes
SHA-256: 33e10186b68b658f83c8ade83e7614dea420a0fe24c3c850e2f7da9cf9d9b90f

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