Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d430295dafbc98e…

MALICIOUS

PDF

79.2 KB Created: 2021-02-12 12:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ed274ca376eb4850cee4cff3b0b0790f SHA-1: 3ea4f2c7459d239f6f17b9b60e06974564d184ca SHA-256: 2d430295dafbc98e8e7591b799dbe32bcefd99fad35dbc0ee3bee0e65b7c675e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs point to various PDF files hosted on external services, likely to distribute further malicious content or engage in SEO abuse. No scripts were extracted, but the presence of numerous external links indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=grand%20auto%20theft%203%20game%20free PDF link annotation
    • https://cdn.sqhk.co/riwifesineji/hfjgggQ/tunakogumomofapapawepeve.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/likuzavorobaki.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/jiegjhj/49240083866.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/jiy8ja3/xivunijogafejitegunadimag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407781/normal_600b3a1c41937.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479715/normal_5fe32e998a259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375341/normal_5ff4d389cb535.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/jgidQha/one_more_chance_movie_lines.pdfIn PDF document text
    • https://cdn.sqhk.co/lomokubaf/hfZ4Cgj/gidakapejugebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426545/normal_5ff6b8f085814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479921/normal_5fd2947099d12.pdfIn PDF document text
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/revolavoranefi_toxodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391925/normal_5ff9f780a0a91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_5fe908b49f055.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/bgjzgcA/arcade_fighting_games_play_online.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
    • https://s3.amazonaws.com/fizufapu/4993773683.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/chrome_os_latest_version_iso.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_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 5140 bytes
SHA-256: 09d84306769822bb2f7693bac45e39d6794b890e97a8813d94e32f2718f688e3
font_01_sfnt_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 10648 bytes
SHA-256: 989b3abcea85ba33f276f1bbbf4b90c6bc316d103339416ee1d92d3fc8cb5e5f
font_02_sfnt_off000121e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E6 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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