Malicious PDF — malware analysis report

Static analysis result for SHA-256 edac11a0ce6c5270…

MALICIOUS

PDF

102.6 KB Created: 2021-03-15 06:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88a398cf044081b47c8265d066b08086 SHA-1: 6848e72bb18a4760250eadf48124e1033f7f820d SHA-256: edac11a0ce6c5270a15a77313305f2622149c12881cbf639f183cb385494b8d2
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 multiple embedded URLs, one of which is `https://golowaki.ru/123?utm_term=ffxv+comrades+build+guide`, suggesting a lure to a malicious site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to appear as a build guide.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=ffxv+comrades+build+guide
    • https://cdn.sqhk.co/jinubodilev/jdAGgfO/41618672019.pdf
    • http://kilobowomix.22web.org/figumivi.pdf
    • http://trylait.club/99075501870i8gm2.pdf
    • http://prodive.su/tapidorekobixk254e.pdf
    • https://cdn.sqhk.co/buganisazobu/tjbidgi/bidalofeturomukamunex.pdf
    • http://copyrightram.net/marvel_schebler_aircraft_carburetor_service_manual4s5ko.pdf
    • http://ogranifruit.space/rumakagasotagexogoleterztzu.pdf
    • http://hookup681.site/best_brain_apps_for_seniorsy2ddc.pdf
    • https://cdn-cms.f-static.net/uploads/4367950/normal_604d00c3b5e59.pdf
    • https://cdn.sqhk.co/togodawexu/id7ghmk/philadelphia_flyers_mascot_video.pdf
    • http://timecodes.net/novation_launchkey_49_mk2_midi_keyboard_fl_studio2w07u.pdf
    • http://naxenavuk.22web.org/keurig_k525c_plus_manual.pdf
    • http://vashmaster.info/naturazerummrg9.pdf
    • https://cdn-cms.f-static.net/uploads/4421464/normal_60175d184b5d6.pdf
    • http://proflist-briansk.ru/nananuzegurekug6vsq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vagelebab.rf.gd/what_are_the_contents_of_a_book_review_sample.pdf
    • https://uploads.strikinglycdn.com/files/d44defb3-529a-453d-a444-5f8c986924db/72970369625.pdf
    • http://boreduse.rf.gd/mukhyamantri_awas_yojana_form_rajkot.pdf
    • https://uploads.strikinglycdn.com/files/23409f5f-d31d-42a0-bea8-6b642ca78c49/30971912180.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014212.bin
99c2c1d23cd9acc753a162b022ee74edad411f1f0edcc223cc264cc1a780948d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14212 3804 bytes
font_01_sfnt_off00014f80.bin
e8f04b843fec7d4fa21fd63205b0d146eee6aa7d4201f31545476130641c1315
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F80 5564 bytes
font_02_sfnt_off00016262.bin
6b98a1c5cdc5663270c8446a26a76bd8d23d613b6660a9bbb7fd88aae1e435d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16262 12368 bytes