Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d1f7d17e90d8e9…

MALICIOUS

PDF

81.3 KB Created: 2021-03-18 07:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0d443ff55c58cf8da54a2befa9256b5 SHA-1: b248b39c6df11814856977b4a9a7e359cff0ef29 SHA-256: 38d1f7d17e90d8e9d7355676bb9701241d132493b971baf0b721b34950a612d1
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, which is a common tactic for phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL likely leads to a malicious site designed to trick the user into downloading further malware or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/123?utm_term=c+objective+type+questions+and+answers+pdf
    • https://cdn-cms.f-static.net/uploads/4475985/normal_602f60d247fc1.pdf
    • http://trenolgia.buzz/gekalalede7scro.pdf
    • https://cdn-cms.f-static.net/uploads/4459645/normal_604d903a98692.pdf
    • http://ipatovaalena.ru/how_to_stop_emotional_sufferingmfrvo.pdf
    • http://thelait.pro/41547064292e0hx6.pdf
    • http://look-hotel.com/10846632252ibdmr.pdf
    • https://cdn-cms.f-static.net/uploads/4456985/normal_605034861c607.pdf
    • http://leopards.space/zippo_collection_guidek5363.pdf
    • http://bluetea.space/65815326023qbh3d.pdf
    • http://hookup153.space/97700609210tyzcy.pdf
    • http://hydraruzxpnew4af.exchange/citizen_eco_drive_gn-4w-s_wr1002h2ps.pdf
    • http://price-list.moscow/88122474423dlebv.pdf
    • http://vezerfa.xyz/49093880632akobn.pdf
    • http://elerctum.org/63919999786slrqk.pdf
    • http://good-production16.site/beats_by_dre_powerbeats_3_wireless_bluetoothj61q2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/temujonuwu/bumafudido.pdf
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_8aaf11a84f804eefbbb412d58e2032c5.pdf?index=true
    • https://s3.amazonaws.com/jazamerijekufol/berwick_upon_tweed_map.pdf
    • https://s3.amazonaws.com/mokixetat/graco_pack_and_play_setup.pdf
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_07fb9356a9e34a139c391ac3b6070070.pdf?index=true
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_7c4754bd05094042a3c077cb46029ae5.pdf?index=true
    • https://s3.amazonaws.com/foneniz/94114566054.pdf
    • https://s3.amazonaws.com/kulinisokakewi/metal_albums_site.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_off0000fdb0.bin
0e738b4ec6cfa4c3441bbd30849cb92a5e2e8ecea6581b1a03195986e88b3cde
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB0 5620 bytes
font_01_sfnt_off000110ed.bin
c96fc86c366e4a398de74c058423775c04fe4dc175f51b0cc7980b8e2e07905a
pdf-font-stream PDF embedded font (sfnt) at offset 0x110ED 10712 bytes