Malicious PDF — malware analysis report

Static analysis result for SHA-256 703c75204a0e87d2…

MALICIOUS

PDF

126.3 KB Created: 2021-02-28 16:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b95014eb5a1c23dea4b80cdc5b069244 SHA-1: 2075332ba4b5b1a87ae9e202304b55a51e77bbde SHA-256: 703c75204a0e87d25b210525ee18744ea9d4909677759ce378bdf0a09131493a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with the primary one being https://pelibifir.ru/123?utm_term=ejercicio+91+algebra+de+baldor+resuelto, disguised as an algebra exercise. The document body, though heavily obfuscated, appears to contain metadata related to the 'wkhtmltopdf' tool and the document's creation date, suggesting it was generated programmatically to host the malicious link. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=ejercicio+91+algebra+de+baldor+resuelto
    • http://finuxezanasa.mygamesonline.org/lencioni_five_dysfunctions_of_a_team_summary.pdf
    • http://damvglaz1.xyz/charles_j_kubicki_for_judgey3rzv.pdf
    • http://wejuzofibab.medianewsonline.com/how_to_get_rid_of_red_acne_spots_on_face_fast.pdf
    • http://sunakijabe.sportsontheweb.net/jbl_eon_615_owners_manual.pdf
    • https://cdn.sqhk.co/gewigerajoru/jc6jf20/tuning_fork_hearing_test_hz.pdf
    • http://uspehdnyaaxyz.xyz/construction_waste_management_plan_templatezeifv.pdf
    • http://waranijovuv.sportsontheweb.net/how_to_find_ip_address_in_command_prompt_windows_10.pdf
    • https://cdn.sqhk.co/luxanimev/Qihidhb/ferapuva.pdf
    • http://mitatizizuje.mypressonline.com/pathfinder_kingmaker_portraits_nsfw.pdf
    • http://electrumwallet.buzz/3498922011303fne.pdf
    • http://likedizar.medianewsonline.com/niveles_de_prevencion_salud.pdf
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/bidubamaragimofa.pdf
    • http://vufajed.getenjoyment.net/27262402313.pdf
    • http://nekretnine.site/geometry_worksheet_5._1b_answer_key7jqhz.pdf
    • https://cdn.sqhk.co/derepinejabi/gUQqQwz/bike_attack_race_stunt_rider_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://kivozusemu.atwebpages.com/what_size_tires_are_on_a_2009_ford_focus.pdf
    • http://kewevagisugimuw.onlinewebshop.net/10078930612.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016685.bin
7ab05a4fd0377e24afd48f42206f7ab28dadeeb2b63b8492d48fdc91465a7de7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16685 5488 bytes
font_01_sfnt_off0001793e.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1793E 3720 bytes
font_02_sfnt_off0001849c.bin
0985336ea0f6926754c30de5b1206b0c28d1c6c9677cfe5fadcb828c2de07605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1849C 2472 bytes
font_03_sfnt_off00018ed8.bin
d29e9a4ca1bff97a86c209643bea452a36cecead125e66607f433079d0bcf2ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18ED8 13576 bytes
font_04_sfnt_off0001bb9a.bin
0b24cc98602b7b847e10216af0a3adcd923959c033ee6a3209f5f39c7796a050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB9A 16852 bytes
font_05_sfnt_off0001d367.bin
12f73747789076b9e51aee6ac3188a74c1f0dc4a7e601ea09038cb9bed31039a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D367 6132 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.