Malicious PDF — malware analysis report

Static analysis result for SHA-256 3787eb8a558ebc35…

MALICIOUS

PDF

74.8 KB Created: 2021-04-06 01:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d87ffc702ac7696b0ca0a7f2f4b2698c SHA-1: 8310027a7df3411e3c2827646cd797c175209958 SHA-256: 3787eb8a558ebc3530333f8cb935e9fe32f448ba2b4f7e4c9f622c1977c8092d
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, suggests a lure related to financial entries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=cash+book+entries+examples+pdf
    • https://cdn.sqhk.co/wowixepis/fjfWRgg/clubhouse_games_switch_list.pdf
    • https://cdn-cms.f-static.net/uploads/4446390/normal_6009b8d3f16ff.pdf
    • https://static.s123-cdn-static.com/uploads/4448550/normal_5fd04e339c8cc.pdf
    • https://cdn.sqhk.co/gixelotopa/4TAsgh5/anger_of_stick_5_hack_apk_android.pdf
    • https://cdn-cms.f-static.net/uploads/4473041/normal_606b87ea6f59c.pdf
    • https://cdn.sqhk.co/xedomobedusi/ghniijd/17185822163.pdf
    • https://cdn.sqhk.co/supajoni/l7DvjVx/chromium_browser_softonic.pdf
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5fef645536fd0.pdf
    • https://cdn.sqhk.co/vevajewez/gbNuUGm/burger_time_game_app.pdf
    • https://cdn.sqhk.co/kapimetavis/hYeibhi/missiles_translation_spanish.pdf
    • https://cdn.sqhk.co/kobewudojuvo/jjgdshb/pinkfong_coloring_fun_app.pdf
    • https://cdn.sqhk.co/wejawujagi/cidggZs/pba_tournament_bracket.pdf
    • https://cdn.sqhk.co/mojikeke/3phg3jj/mario_kart_wii_controls_gamecube.pdf
    • https://cdn.sqhk.co/kamugututu/gjjhLge/35440791728.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kogagudun.rf.gd/pidewo.pdf
    • https://uploads.strikinglycdn.com/files/bd6e0b42-e48c-446c-81c7-4866da406d55/what_helps_menstrual_cramps_naturally.pdf
    • https://uploads.strikinglycdn.com/files/5e3b9a4b-8207-4bc1-a55a-ba529615bd32/how_does_load_order_work_skyrim_xbox_one.pdf
    • https://s3.amazonaws.com/dazifozixawus/conectores_en_espanol_lista.pdf
    • http://boxawigituwa.rf.gd/sewomowudinofobadevidux.pdf
    • https://s3.amazonaws.com/neporezofov/umbilical_artery_doppler_waveform_analysis.pdf
    • http://sonowodiguvab.epizy.com/cbse_guidelines_for_class_11.pdf
    • http://gupiwozekozib.rf.gd/vezamakimurolibelo.pdf
    • https://uploads.strikinglycdn.com/files/f2866c04-e40a-471c-99a5-877cd331cf59/gewalafikuwasel.pdf
    • https://s3.amazonaws.com/dozore/offline_audio_bible_apk_app.pdf
    • https://uploads.strikinglycdn.com/files/647f7086-da95-4ae7-bf57-772b855f47ff/ebay_cabelas_meat_grinder_1hp.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_off0000e869.bin
b72a3054e7834e35dd26afee3b233f3cfebf97c7c4521041ffafeeea45782d3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE869 5456 bytes
font_01_sfnt_off0000fac7.bin
1d51a6f193c218aa5dd67aae60716d0484db158612505ff0c0546ac0dc157d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC7 10220 bytes

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