Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b47e62008eb1f1…

MALICIOUS

PDF

80.1 KB Created: 2021-03-19 06:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5e69f72b45cb54ad91f3e2c539e99c4 SHA-1: 8eba2bf023959faa870a132a54364dd5c4248ae9 SHA-256: 85b47e62008eb1f1c5989413712422d75040a99fbd15c1058c5b43f1f31a0062
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 'resalured.ru', which is highly suspicious. The document body, though heavily obfuscated, appears to reference product information, likely as a lure to encourage interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/strik?utm_term=bobbi+brown+makeup+brush+set+price
    • https://cdn.sqhk.co/febapaji/Rifhbhb/bapizopiborotanojonopom.pdf
    • https://cdn-cms.f-static.net/uploads/4369179/normal_605028f806dcc.pdf
    • https://cdn-cms.f-static.net/uploads/4375716/normal_602aa84a9794c.pdf
    • https://cdn.sqhk.co/totafeta/hcLgiha/43939375264.pdf
    • https://cdn.sqhk.co/rifibimilo/hhgejel/atv_max_racer_speed_racing_games.pdf
    • http://wipunemobak.mygamesonline.org/perijaje.pdf
    • http://dabinepoj.mygamesonline.org/acute_abdomen_surgery.pdf
    • https://cdn.sqhk.co/nenakowi/AgjTvhf/kudal.pdf
    • https://cdn-cms.f-static.net/uploads/4464878/normal_6041d90cc1e69.pdf
    • http://gegebafebofad.scienceontheweb.net/xasivanodonogunepe.pdf
    • http://vuzuwul.getenjoyment.net/toyota_camry_2012_regular_maintenance_schedule.pdf
    • https://cdn-cms.f-static.net/uploads/4494657/normal_602ba4699fa69.pdf
    • https://cdn-cms.f-static.net/uploads/4479938/normal_604ee0ae7f95d.pdf
    • http://rovanenafet.getenjoyment.net/welevavowupozisolibaxamod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3beca64b-d1af-4006-9d98-e7caaffa68fc/wasupatibi.pdf
    • https://uploads.strikinglycdn.com/files/522fd4ba-8f1d-4397-9b97-8bb645227dcf/91442672796.pdf
    • https://uploads.strikinglycdn.com/files/ad2275bb-565b-49e6-ade8-35f635dcbb13/maxolejatijubozisojizurom.pdf
    • https://uploads.strikinglycdn.com/files/6561fa09-896d-48bf-b597-1e1eecdf02b3/getudejakiwefope.pdf
    • https://uploads.strikinglycdn.com/files/47da7df2-cad4-46ea-a162-b52a335c2c13/how_to_use_craftsman_digital_multimeter_82015.pdf
    • https://uploads.strikinglycdn.com/files/f2af9708-3d65-4ce4-affd-76960796e363/when_was_the_apocrypha_removed_from_the_king_james_bible.pdf
    • https://uploads.strikinglycdn.com/files/7e646e49-947c-4f4d-967a-2cea1950306c/what_are_the_different_basic_element_of_poetry.pdf
    • https://uploads.strikinglycdn.com/files/2ff13fc9-1bc1-4d5a-823d-dedea2b87523/why_is_my_hp_printer_not_printing_correctly.pdf
    • https://uploads.strikinglycdn.com/files/67063886-bf1b-42a2-9cb8-7af179a04bb7/39083767631.pdf
    • https://uploads.strikinglycdn.com/files/87093087-c985-45f2-b03d-fe6172b11861/toro_lawn_mower_dealer_near_me.pdf
    • https://uploads.strikinglycdn.com/files/fb6cc815-409e-4388-a912-7021d3b6888c/honda_hs520_carb.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_off0000f77b.bin
6027948379ed29739a79083f482e3accfeb2ded501a2fc0b4ace1a386aa212eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF77B 5488 bytes
font_01_sfnt_off00010a0a.bin
792a03131fcbe7f049c1c2bdee7e709bb07ec43ecf18e54f6b43a7a12eab8f9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0A 11656 bytes

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