Malicious PDF — malware analysis report

Static analysis result for SHA-256 995ede50a2c5bebc…

MALICIOUS

PDF

73.9 KB Created: 2020-11-14 18:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1d0f213dad58653ce6f608e84af3726b SHA-1: 24b841b41211708403490d1e4ad2453f06bc4db8 SHA-256: 995ede50a2c5bebc2f7744fd56f52bc90db8c415324169cdb45a9b0dc80e35a0
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 0.9998

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://traffking.ru/strik?utm_term=gta+vice+city+radio+station+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8aa061d278f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8ac7809e332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444655/normal_5fa1b344062c1.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/denesanijibep.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/8d4520779e2.pdfIn PDF document text
    • http://(youripaddressIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fodose/vixuxexesitol.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/mahiki_drinks_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc17623-850a-4f68-92ec-1a84587cf02d/how_to_download_a_fortnite_mod_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6cab80d-7fd2-4a97-a990-934329e6e254/75061489912.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/16459513904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7344f7d3-a376-4f2d-802a-8bdddc937610/52037611188.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/calendar_ortodox_2019_stil_vechi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7df38e-21ef-4d59-b8cd-011d5792570d/63745653858.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/critical_path_method_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cef1d1e-bbc4-4f68-a504-21d9ac2949d4/wisigugugofamilelebevokul.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_off0000e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 5216 bytes
SHA-256: 992bf1078014242300c8f11ffdfe46d514e489d318446c1254b30f4e13846c14
font_01_sfnt_off0000f726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF726 10512 bytes
SHA-256: bd542f90666933c69b52dcd44bca613466d6172b8d2cea61d6db8cfcd9be5ee7

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