Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac863e7fbd7fd361…

MALICIOUS

PDF

79.0 KB Created: 2021-02-26 19:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ed84431449ea5a598ece2d7529ee2d9c SHA-1: 6995c9f4e37678bb92b1e86645c3b0009a7ceedf SHA-256: ac863e7fbd7fd3611f4888c8e2ce4d8d3d0ee0836bd5b5d0b60a567b40a40f88
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which is flagged as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack vector appears to be directing users to a phishing site via the malicious URL, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/123?utm_term=rancilio+silvia+model+differences In PDF document text
    • http://betijeduw.getenjoyment.net/is_homework_helpful_for_students.pdfIn PDF document text
    • http://tublitalia.space/percy_jackson_and_the_lightning_thief_book_pageshhhv8.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/11945653007.pdfIn PDF document text
    • http://proflist-briansk.ru/alien_predator_blade_runner_universecdwwb.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/xodafugiwefajela.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/pilazi/89782010577.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/basketball_stars_latest_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/lufofekozifebaviputi.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/lumiloboni.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/sulagedenirusinilug.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/guardians_of_the_galaxy_ride_news_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/65222761396.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/mujasetujijuzagiwefemada.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/sony_sa-ct260h_sound_bar.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/gegamomorirov.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/adobe_photoshop_7_for_android_apk.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_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 5232 bytes
SHA-256: aa1c09eb72420cd25cd7df92117b7b3d2364f28f4f91822967d5accbf3c4ea1d
font_01_sfnt_off00010a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1B 10840 bytes
SHA-256: 9a9bbcfb84d5b6e59a82db4fffbddab23f1ab1474a32b4d3a37c33a0071618bb

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