Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aac3040ed228776…

MALICIOUS

PDF

76.3 KB Created: 2021-03-17 20:26:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14ee7724c077b12b5fdb28b8b8fa1fca SHA-1: 3d97bf6800e5ca9d50495fc4b8af7a13392afced SHA-256: 8aac3040ed22877690a53099e8f5a5c742f91ca7840026e8fc7ff7a124e448c6
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and a high ML score combined with ClamAV detection indicates malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'public limited company pdf', likely a pretext to drive users to the malicious URL for phishing or further payload delivery.

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://resalured.ru/award?keyword=define+public+limited+company+pdf
    • https://cdn.sqhk.co/jawutuwek/dDBljeF/oklahoma_city_unemployment_news.pdf
    • https://cdn.sqhk.co/nurofiwele/hcWjfPa/animal_shelters_hiring_near_me_at_14.pdf
    • https://cdn.sqhk.co/remimidotomi/hGgfgjX/26580753412.pdf
    • http://itgermany.net/mirenigonempaho.pdf
    • http://zimefob.22web.org/putizobekugajudikivam.pdf
    • http://zitosobuzozuz.22web.org/age_of_wonders_iii.pdf
    • http://alfa-quest.ru/sevudollt0ei.pdf
    • http://lawyer-consult.ru/xezibidadakipuzaxaxeg23tcn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aad664c5-3bc1-48ff-9b9d-b277e8595d8c/big_green_egg_large_table_price.pdf
    • https://uploads.strikinglycdn.com/files/05b73334-1664-42d8-8afc-0a0e4708cbb4/california_leave_of_absence_chart_2020.pdf
    • http://norenebe.rf.gd/fullness_elevation_worship_chords.pdf
    • https://s3.amazonaws.com/gonima/asian_airline_crash_news_report.pdf
    • https://uploads.strikinglycdn.com/files/10085745-b00a-439c-ab91-bb3ce06f920e/vagovasij.pdf
    • http://kanuximus.rf.gd/subject_verb_agreement_worksheet_for_class_10.pdf
    • https://s3.amazonaws.com/fukepez/vugexutejalomipidipa.pdf
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_982aa5780ffb476eb06cd51b6d69c990.pdf?index=true
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_ff1428733f5e4ca2a4ebfd53bc17a94e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/10370ba3-7075-4e40-98b2-8b06a48580ef/99772486064.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed3c.bin
120da673b09038a99f6ad71cda1bb3e7309ab38e8fcf52506ea956df09d9709b
pdf-font-stream PDF embedded font (sfnt) at offset 0xED3C 5268 bytes
font_01_sfnt_off0000ff21.bin
078a88ad661574b79b07f52b1372fda3415e38084556943e487fd433ac9db600
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF21 11812 bytes