Malicious PDF — malware analysis report

Static analysis result for SHA-256 e668313d8f06267b…

MALICIOUS

PDF

70.2 KB Created: 2020-11-20 07:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a958371d08412d001cafb3bbdd9004fb SHA-1: 9ce65b2c3897eaf83f421497e5803c6b11b4e57c SHA-256: e668313d8f06267bef33356afd40d328d1fe64358b4b80d5a57853d3f6764652
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/123?utm_term=banderas+de+puerto+rico+en+los+pueblos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377125/normal_5f8f8fa4b503e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fb6b6973a445.pdfIn PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/6490152da673.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/7341459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5f8c1b63d6932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_5f924263db985.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/xanofamaja/tsunami_2004_english_victims.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/jupom.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/76773701641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ffe03ca-52ca-457c-9027-cb13cbe2c32a/jopisojip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fc1b95-e9b1-46a3-a5fa-b5432098563f/7288549094.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/86551048696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5dade69-22cd-4e43-bd8a-b7662267be80/pejotipotemeb.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_off0000d30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30D 5256 bytes
SHA-256: 7342771e48660ac673d7cc625e18976d96ebe6f022c352c7eacfc641fd3ce277
font_01_sfnt_off0000e4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F0 11512 bytes
SHA-256: c14225c7a810fbf140eefc1b41dd5fe2f3a0b74a5b7355e1eb03a995e1d39d77

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