Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e0bba5b5e24fda…

MALICIOUS

PDF

73.5 KB Created: 2021-02-28 19:10:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1471cb0ecac2ec5094a8d11f89a39a8f SHA-1: 7ee8c1364f88d25f495a6a6622007895a8c52d23 SHA-256: d0e0bba5b5e24fdabaa717ad4a0c51cf3e9a743e6ea1bc1e4cefb0a4c0741561
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of the document being used to distribute malware or conduct phishing by directing users to various disposable domains. The presence of embedded URLs further supports this attack pattern.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/wix?keyword=shadow+of+mordor+guide+pdf PDF link annotation
    • http://websporizle4.com/zixikamidomezeferowofogux1jm4w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505363/normal_5fc967977cd6d.pdfIn PDF document text
    • https://sidedelozamuk.weebly.com/uploads/1/3/1/4/131482822/d6ee53.pdfIn PDF document text
    • http://aarbuz.space/toefl_structure_exercisealiot.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/bbigDgj/funny_memes_love_stickers_for_snapchat.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/ajbX6gh/kelufetukelogopabixug.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/nolosofajoxofubalodawej66d6.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/winunijuru_fodewekumuso_jarivigepax.pdfIn PDF document text
    • http://sodahub.pro/temporary_appointment_letter_templatew01ri.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/e10c8163.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/2hd8bXd/22334920167.pdfIn PDF document text
    • https://xonutupusuvulin.weebly.com/uploads/1/3/1/8/131871786/sojofufawegit.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/widuxade/3083559124.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/best_electric_cars_2019_consumer_reports.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_off0000e37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37D 5440 bytes
SHA-256: f9f0e47988e473fcf9da501c084e258d9c77d1db445b82fdb7e2ad65060365c7
font_01_sfnt_off0000f5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E7 10324 bytes
SHA-256: 52c1bfbfb2c7339ea8135b4b4ff2f5350e5b308d3a1032dd5bb351425598668e

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