Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78e6d581dd4f234…

MALICIOUS

PDF

75.1 KB Created: 2021-02-17 04:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64c73095fd5cd30e3b49a0796e5bd5bb SHA-1: 75ea5830a7acf6cd3fc915174a578f2ed5464734 SHA-256: d78e6d581dd4f234a108362e5764a62cfb42b8d483942ea3546ea10ddb16433d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a popular book title, designed to trick users into clicking the malicious link.

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
  • 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://maypoin.ru/wix?keyword=a+court+of+mist+and+fury+pdf+google+drive
    • https://cdn.sqhk.co/senosekagoko/ijUD4Fh/snappers_fish_and_chicken_seasoning.pdf
    • https://cdn.sqhk.co/xeloxilava/tgerhbq/parliamentary_democracy_examples_today.pdf
    • http://nutopul.22web.org/30306712049.pdf
    • http://kind-insta.site/xizoxibaganakatozoramabojvpbk.pdf
    • https://cdn.sqhk.co/fudamewojaf/1RihhhR/rinisonexumolezubusi.pdf
    • https://cdn.sqhk.co/jumifokujuje/1oBhjui/evolutionary_theory_psychology.pdf
    • https://cdn.sqhk.co/turanexode/hhjf2jg/skullduggery_island_walkthrough.pdf
    • https://cdn.sqhk.co/muligumixe/ozihial/suriwubunazitumapis.pdf
    • https://cdn.sqhk.co/vujagefamig/djfgeih/road_crash_bandicoot_tips.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://naremijex.epizy.com/redumudokoxavaw.pdf
    • http://beguresenoraw.epizy.com/kanmani_pol_en_amma_song_masstamilan.pdf
    • http://vutekumini.epizy.com/49520696572.pdf
    • http://wewonak.rf.gd/61389927618.pdf
    • http://toxabose.epizy.com/al_bayan.pdf
    • http://nuwumunis.epizy.com/calendario_laboral_2019_catalunya_para_imprimir.pdf
    • http://lafebevu.rf.gd/11692523707.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a0.bin
d7cee1169c354e831b91d07b2156a94d60c2e5ab877ce0693705d74cf3adb01f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 5628 bytes
font_01_sfnt_off0000fbbd.bin
1988305d0c55c96a9c9c74fceac8bed3669adf5e1b03b29f986fd452087c57f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 10244 bytes

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