Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4281d5034900d63…

MALICIOUS

PDF

105.4 KB Created: 2021-03-18 23:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f98889cd56072a1d41960305a2ef655e SHA-1: dc00ae372f9f5332285620ee8cc2da982791e104 SHA-256: b4281d5034900d63844acec99d55b461bedae56ad847c8cf6a591804bc5fcc39
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://jacksth.ru/123?utm_term=babylonian+creation+story+pdf PDF link annotation
    • https://cdn.sqhk.co/lokovipazal/jbHhjNM/79175567807.pdfIn PDF document text
    • http://tevuvisena.iblogger.org/rewerukefanukik.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdfIn PDF document text
    • http://lawobusupovapuv.22web.org/kerry_group_limited_annual_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tetizawoto.rf.gd/gosukuj.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/lutuxumulataninapixebomef.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/labefenexufifapo.pdfIn PDF document text
    • http://joluvolob.epizy.com/xabarotulesizenudalabazo.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/audiomack_apk_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/kowafelawesevilenibugizo.pdfIn PDF document text
    • http://pasafafelun.epizy.com/goodnight_moon_song_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/sokakajenidotewojumulu.pdfIn PDF document text
    • http://joxesovifelerav.epizy.com/14973838139.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/bhilai_power_house_weather_report.pdfIn PDF document text
    • http://pijutisiguzog.rf.gd/xasanukunalegukovomul.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/rexan.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/twitter_videos_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/pelpro_pellet_stove_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/bosadomanusukow.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/fur_elise_short_version_sheet_music.pdfIn PDF document text
    • http://zufisad.rf.gd/49769284232.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/lizubiwid.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_off00015e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E0A 5440 bytes
SHA-256: b48c4259544df0c44c325317820647fd0c54bcddbc03987cf16d251d463b968d
font_01_sfnt_off00017096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17096 12196 bytes
SHA-256: 5af8cc2fdb6c4a0bb28dc6a64b2e1b6896e175e7f5001712d2f3c8836ee5eab5

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