Malicious PDF — malware analysis report

Static analysis result for SHA-256 b90512abe70cd0ee…

MALICIOUS

PDF

82.0 KB Created: 2021-03-25 23:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aedaeb81682cb550dde272caf1ee3696 SHA-1: d59a79144a9db25b19e7007361c5c70028a281b3 SHA-256: b90512abe70cd0ee79323387acacb0afa82e5793ef119fad816c51921df904ec
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing page. The document body, though heavily obfuscated, suggests a lure related to academic materials.

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://ponafet.ru/award?keyword=algebra+2+textbook+pdf+big+ideas
    • http://mazipuvaxa.mywebcommunity.org/61246134872.pdf
    • https://cdn.sqhk.co/pufowuvikij/gjiihbf/87406622265.pdf
    • http://frut-tree.site/biostar_h81mhv3_bios6d4ca.pdf
    • https://popofexepazor.weebly.com/uploads/1/3/2/6/132680818/2c8692.pdf
    • http://digitaltoolsfor.xyz/chemistry_1_ionic_bonding_practice_problems_worksheet_answersggz26.pdf
    • http://gexulogoben.sportsontheweb.net/wulodogarorurofixekeg.pdf
    • https://cdn.sqhk.co/putevupumaf/lmiaFyH/jujujumogate.pdf
    • http://wumiwuzigimo.mywebcommunity.org/rukopotojemovepaku.pdf
    • http://dfwshootersupply.com/24774062762atowt.pdf
    • https://cdn.sqhk.co/lawikuto/jfcicBx/4633111958.pdf
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/gakobobodafegi_tagige.pdf
    • https://cdn.sqhk.co/wolebiduju/hgfKQSt/bazejonirunitivebewavez.pdf
    • https://cdn.sqhk.co/butemobe/migjihg/choice_of_the_vampire_2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d7e5992d-381e-419d-8b92-1ef25ee05dec/best_device_for_music_while_running.pdf
    • https://s3.amazonaws.com/betefowubevat/57944072867.pdf
    • https://s3.amazonaws.com/pekatikisuruki/forokusarejidosumejuw.pdf
    • https://uploads.strikinglycdn.com/files/3eb53b80-3457-4b3a-9c94-aa3893ea7252/whats_new_galaxy_watch_update.pdf
    • https://s3.amazonaws.com/rewepalazamiso/comparative_superlative_forms.pdf
    • https://uploads.strikinglycdn.com/files/702ef82c-400f-478d-9f70-97ea891814fa/stathis_kalyvas_the_logic_of_violence_in_civil_war.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_off0000f8e6.bin
b0f00f7c4d9c6abe8ffdf1b6a5b90e2c95442684cc3e1aca5e8f0a115a3bd144
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E6 5284 bytes
font_01_sfnt_off00010af4.bin
3bbb4b42bb8b34eca9fc730d5c26733f132aa4581fb5379d290806750d886693
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF4 9852 bytes
font_02_sfnt_off00012cb4.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB4 4324 bytes