Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0618ad7b2865a5…

MALICIOUS

PDF

69.6 KB Created: 2020-12-29 10:49:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fe64ab33db7c4de127176edc003c4980 SHA-1: 10738a197061b0c95dd3f462743f4b4aeb64c3ad SHA-256: 1c0618ad7b2865a5ad2efab60e79c33c1bc5696c7226662c7d2c7a99445d362e
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://trafffi.ru/123?utm_term=drop+it+song+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371023/normal_5fc7c6eb325a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f8903b3d7530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427504/normal_5fe63992b63cc.pdfIn PDF document text
    • https://vitumiwoz.weebly.com/uploads/1/3/4/6/134697216/4328932.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5fcd4001f0f38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fc07d7-b960-4507-94d8-fbb44d5455e4/49468115367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a73b8afa-5f59-4fa9-a070-88f46b0f0ff0/jarosu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/shrimad_bhagavad_geeta_in_hindi_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d8e5ee-0d14-41f7-926d-d899501d9e69/gummy_bear_lyrics_french.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/jefasexorekabagezebov.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/bakaramuvavina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87992d78-9bf0-447b-8217-62116c0970e5/first_alert_co615_review.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/veripiboba.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD628 5220 bytes
SHA-256: 8c4476b7406e70727ab517c73d8d69f18d5f3eff2c72f429294c5bee4dc51fbc
font_01_sfnt_off0000e810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE810 9916 bytes
SHA-256: 921d47eeabe5127dab8fe41534c9d15af9c1de1795cb367342a8cb69135d0fac

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