Malicious PDF — malware analysis report

Static analysis result for SHA-256 955ad8e37a4b7f71…

MALICIOUS

PDF

82.5 KB Created: 2021-03-28 05:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17253ce2ce78eb2cf9bd80321fe24195 SHA-1: 7d81b0a7fd4474d0fcf352b1cadb30b275292bca SHA-256: 955ad8e37a4b7f717676c9933091bc357e3b1070164734efd3d8fbfd21626835
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ML classifiers and ClamAV. It contains an embedded external URI pointing to a suspicious domain, which is likely used to host a phishing page or download a second-stage payload. The document body, though heavily obfuscated, contains text related to 'Metro copenhagen airport to norreport', suggesting a lure to trick users into visiting the malicious URL.

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://golowaki.ru/123?utm_term=metro+copenhagen+airport+to+norreport
    • https://cdn.sqhk.co/fikalibumi/ihhUjak/25079868104.pdf
    • https://cdn.sqhk.co/nuvurero/cOPic7v/parisizafat.pdf
    • https://cdn.sqhk.co/jedabawefi/giMLtcm/nerofovuzolofagaxosam.pdf
    • https://cdn.sqhk.co/datujisukebe/aonnCDz/69780681304.pdf
    • http://sale-siberian-force.online/lexus_rx_350_price_in_nigeria_20157corp.pdf
    • https://cdn.sqhk.co/dixejetafap/00Uiegi/safety_notes_for_meetings.pdf
    • http://domodip.iblogger.org/nusasef.pdf
    • http://datinge.site/human_development_a_cultural_approach_3rd_edition_apa_citationz8497.pdf
    • https://cdn.sqhk.co/tovitaxani/c0hcyJi/17922239728.pdf
    • https://cdn.sqhk.co/xoluxuroku/gTfvYgg/3348205317.pdf
    • http://jakartapro.xyz/33354842874cqtck.pdf
    • https://cdn.sqhk.co/xuxodokoju/FwuHgfR/61316380055.pdf
    • https://cdn.sqhk.co/norejasiwiza/c6yYjdH/gilolusepatolapezidatiz.pdf
    • https://cdn.sqhk.co/zoribakim/0wmliaJ/bruxelles_formation_bf_industrie_anderlecht.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mubizutoperix.rf.gd/tell_me_a_riddle_tillie_olsen_i_stand_here_ironing.pdf
    • https://uploads.strikinglycdn.com/files/749dd261-5915-4705-aafb-23715d2ac06b/how_to_self_clean_ge_wall_oven.pdf
    • http://sakofosepemu.epizy.com/lateral_thinking_logic_puzzles_with_answers.pdf
    • http://zosusakadutadi.epizy.com/present_perfect_with_yet_already_just_exercises.pdf
    • http://sefowolo.atwebpages.com/schaums_physics_for_engineering_and_science.pdf
    • http://vavijirodujozi.rf.gd/9628428394.pdf
    • http://wegugoleta.onlinewebshop.net/tunobawufukiw.pdf
    • https://uploads.strikinglycdn.com/files/935a1320-e001-497d-abde-aba7e22bf9ee/the_birchbark_house_comprehension_questions.pdf
    • http://kikukuvikato.myartsonline.com/states_of_matter_worksheet_high_school.pdf
    • https://uploads.strikinglycdn.com/files/6a6498ca-04f1-4d85-8b33-4473c2bcede8/how_to_reset_garmin_forerunner_920xt.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_off0001032a.bin
a439282ed6bab3620a718f6ae21c495aff677b21ffd9bf14b8c504396f65e7ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 4992 bytes
font_01_sfnt_off0001142b.bin
60bae02e0afddca984aaaacc69600b8e8ccbcb32f07ca7435a3812f8f4c73e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1142B 12164 bytes

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