Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c8489a9f3bd3ba…

MALICIOUS

PDF

77.1 KB Created: 2021-02-20 09:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4a7db9844f16ef5043612e393f94f3bc SHA-1: 154203f1dc28bcc9867f802cc5c442471e896d79 SHA-256: 37c8489a9f3bd3bad11e02cf82e526fb45a3ce45936f94fe7541cfc85822a6c8
154 Risk Score

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://yafferge.ru/wix?keyword=unit+2+geography+challenge+answers In PDF document text
    • http://nexusisuperat.22web.org/why_did_humphry_davy_invent_the_lightbulb.pdfIn PDF document text
    • http://votamomitep.22web.org/saazish_video_song.pdfIn PDF document text
    • http://paktum.pro/80144220631e5cyq.pdfIn PDF document text
    • http://christinaanddavid2019.com/rumurosewakinepipevedoxae9hk9.pdfIn PDF document text
    • http://takojebuti.iblogger.org/lujijumajeguli.pdfIn PDF document text
    • http://letgtma.bid/its_a_great_day_to_be_alive_gifemqpf.pdfIn PDF document text
    • http://kernig.pro/rirezemejodilixisugava1d7sp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ladisopezaxak.epizy.com/mangatoon_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/chrysler_town_and_country_2016_owners_manual.pdfIn PDF document text
    • http://nunidekizezovaf.rf.gd/69085158110.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/jizale.pdfIn PDF document text
    • http://xafamikipu.epizy.com/alaipayuthey_movie_music_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/kafaxumizofujobopevaru.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/bijudek.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/dononapamonaderedikamisam.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/jiwasano.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/23559564332.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/girl_guides_of_canada_registration_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/my_talking_tom_apk_mod_unlimited_coins.pdfIn PDF document text
    • http://fuxodenajakifut.epizy.com/brandywine_river_museum_trains.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_off0000ef67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF67 5512 bytes
SHA-256: e160e6c5d614c3de15fbd3975ea264d1251c3e6223d9ab1dbbcc3ce321bdfdf9
font_01_sfnt_off00010240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10240 10828 bytes
SHA-256: a6d93d188d6f749c2a71d7b7abf42aee64f74ac1b0a0380f4751cd04efcd0f77

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