Malicious PDF — malware analysis report

Static analysis result for SHA-256 9743b8f2728d3de2…

MALICIOUS

PDF

77.8 KB Created: 2021-04-16 23:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 299c7bd064edd33aba6819bc0fe1bdd6 SHA-1: d3254c507affc750d6540fb2d794addb6ca39e46 SHA-256: 9743b8f2728d3de2c3fcf606590a83dc09518f92754d5f4089673d255ce60bcb
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file. The document body, though heavily obfuscated, appears to contain keywords related to car parts, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=2005+dodge+ram+1500+fuel+pump+shut+off+switch
    • https://static.s123-cdn-static.com/uploads/4462035/normal_5fdcc920b82d1.pdf
    • http://jupimok.iblogger.org/how_do_you_run_a_diagnostic_test_on_a_kenmore_he3t_washer.pdf
    • https://cdn-cms.f-static.net/uploads/4369316/normal_6038803b887b1.pdf
    • http://biomanua.website/nfl_fantasy_football_draft_board_online4e7ze.pdf
    • https://static.s123-cdn-static.com/uploads/4467007/normal_5ffe4c0ae01f9.pdf
    • https://cdn-cms.f-static.net/uploads/4483089/normal_606c5d937bf30.pdf
    • http://astropsychology.website/crawfish_etouffee_nutrition_informationcbi0q.pdf
    • http://digitalliteracyinstitute.com/greek_and_latin_roots_worksheets5e724.pdf
    • https://static.s123-cdn-static.com/uploads/4421780/normal_5fdf9ea58b301.pdf
    • https://static.s123-cdn-static.com/uploads/4403685/normal_6007c256279a8.pdf
    • http://sabazat.22web.org/tewinenoruvitotebu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/89e0e197-0950-4651-874c-2244364c7e1d/98081007012.pdf
    • https://uploads.strikinglycdn.com/files/b562c6e1-3a55-446a-ab3c-4558da7f0c7f/enron_the_smartest_guys_in_the_room_full_movie_putlockers.pdf
    • https://uploads.strikinglycdn.com/files/443eeca5-f728-4724-9e38-db694990e083/best_used_car_for_under_5_000.pdf
    • https://uploads.strikinglycdn.com/files/1e71c1e8-1365-437a-afc3-9996d742d309/dialektik_der_aufklrung_einfhrung.pdf
    • https://uploads.strikinglycdn.com/files/02a0b122-4f9f-4288-bbd9-c6a7fa56e016/mebitutosijuzizunulako.pdf
    • https://uploads.strikinglycdn.com/files/a5651ac7-b162-4275-a52b-89a90718cae7/gisilofowenagojolidasidev.pdf
    • https://uploads.strikinglycdn.com/files/6dd6b02b-08eb-4b07-98dd-b24b3cbb38c3/para_que_sirve_el_te_de_manzanilla_canela_y_limon.pdf
    • https://uploads.strikinglycdn.com/files/8b484a54-c83c-4b1b-ae15-3ada52b8a5b9/german_irregular_verbs_complete_list.pdf
    • https://uploads.strikinglycdn.com/files/a88d94c7-1e61-4b9a-a4d0-397c0faf34f5/jack_lalanne_fusion_juicer_stopped_working.pdf
    • http://kasedabinat.rf.gd/avancemos_1_answer_key.pdf
    • http://rojepubaxogo.epizy.com/bowutafujozikadim.pdf
    • http://bumotelaladu.epizy.com/soil_erosion_types_and_causes.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_off0000e321.bin
68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE321 2900 bytes
font_01_sfnt_off0000ed64.bin
7563a90913f5d20558e97dc08a51fdfd94f1a4f266a8e96d86bd5705babfa848		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED64 6016 bytes
font_02_sfnt_off000101d1.bin
c195e8430b96cab61e966f61375b71ae85d6e748312115d29b4aba140275b3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D1 10848 bytes

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