Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ecfca55a79b031…

MALICIOUS

PDF

75.3 KB Created: 2021-02-28 23:02:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf933ff077d1c5b2c497931dd2851a55 SHA-1: ef0423c0ae264e0d8c3e0cd0d8fe701cf8ea9b77 SHA-256: a1ecfca55a79b031dfa5d3c2bf7243bf8267119844499d7ba886d59b534ceb31
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, indicating a high probability of malicious intent. It contains multiple embedded URLs, one of which is presented in the document body as a link related to meeting minutes, suggesting a phishing or malware distribution lure. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/123?utm_term=como+hacer+una+minuta+de+junta+de+trabajo
    • http://zakewabo.scienceontheweb.net/riliji.pdf
    • https://cdn-cms.f-static.net/uploads/4465397/normal_603023bd51b11.pdf
    • http://gixipures.sportsontheweb.net/77922392711.pdf
    • https://cdn-cms.f-static.net/uploads/4496204/normal_6018ade90a1f9.pdf
    • https://cdn-cms.f-static.net/uploads/4381544/normal_60343b70b9f39.pdf
    • https://cdn.sqhk.co/bijozugetav/iWFgfYq/warhammer_40000_freeblade_apk_download_ios.pdf
    • https://cdn-cms.f-static.net/uploads/4451950/normal_6012b0dd43815.pdf
    • http://suzamajotibe.mywebcommunity.org/what_happened_to_pablos_family.pdf
    • http://pofaduxiruk.getenjoyment.net/8843239597.pdf
    • https://cdn.sqhk.co/piwizogir/gbbNDHD/abba_bang_a_boomerang_lyrics.pdf
    • https://cdn.sqhk.co/dilobowuz/Pc2Vgey/drag_racing_near_me_videos.pdf
    • https://cdn.sqhk.co/dipewoduge/Figjihe/sebejexazijagomupitajozik.pdf
    • https://cdn.sqhk.co/rogekanus/aCx6VAp/monkey_go_happy_ninja_hunt_2_walkthrough.pdf
    • https://cdn-cms.f-static.net/uploads/4427267/normal_60152b019f7e9.pdf
    • https://cdn-cms.f-static.net/uploads/4391903/normal_6015c50fc6a48.pdf
    • http://xilatotes.sportsontheweb.net/10582158442.pdf
    • https://cdn-cms.f-static.net/uploads/4501660/normal_5fd157af4878a.pdf
    • https://cdn-cms.f-static.net/uploads/4480758/normal_5fe7cfaf378f9.pdf
    • http://puvepum.getenjoyment.net/32378643148.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://widusop.atwebpages.com/30271983353.pdf
    • http://lavorusopanutaw.rf.gd/avocet_mining_plc_annual_report.pdf
    • http://sawujasasit.epizy.com/sepse_neonatal_2017.pdf
    • http://kaxuwenewutexu.myartsonline.com/pioneer_avh-x1600dvd_wiring_diagram.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_off0000e7fd.bin
4a2388c2d7f080f8bd75f6867ee558624befb69e50e8906b85d1c79788a6eaca
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FD 5088 bytes
font_01_sfnt_off0000f917.bin
1c1892a074e68b0c809eb47068a94b484c41b80940d5eca15294f0e882753ad6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF917 11304 bytes