Malicious PDF — malware analysis report

Static analysis result for SHA-256 733a9d81a50de0f6…

MALICIOUS

PDF

75.0 KB Created: 2021-03-10 04:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: d55ad6fb403771991f7125e4b31f6444 SHA-1: f995e6336144258befa1e5244547a7e11780f1a2 SHA-256: 733a9d81a50de0f647e6c7114c59d5d948dd716911836b0ec66706ac6cad194c
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 a suspicious domain, which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL suggests an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/aws?utm_term=what+is+the+poem+remains+by+simon+armitage+about PDF link annotation
    • https://cdn.sqhk.co/pefibovip/jeNgjQ7/sunurifolifatirudubivaxuw.pdfIn PDF document text
    • http://amin-ukraine.net/61014910051t7gs0.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/EQtjgZg/kirimazidoxulisupupeb.pdfIn PDF document text
    • http://kvrovk.xyz/journey_to_the_center_of_the_earth_1959_moviegrfoe.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/5hhgiK2/christmas_origami_instructions_hex_star.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/aicv3g6/gallery_furniture_houston_locations.pdfIn PDF document text
    • http://lisolu.org/how_to_check_your_voicemail_on_a_panasonic_phonevmvpx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dabatisew/bengal_tiger_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb331467-eb00-4e8f-b19e-ff04ef2e4e40/zaxobafune.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/automatic_gearbox_manual_override.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/calculating_slope_from_two_points_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/2112793013.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/game_tekken_5.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/pubobami.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/46574377567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efaad9b7-748d-48ef-8b03-0c31ddfbe932/ruletobofuwarudefif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/151c6733-172e-4b39-a199-c6c2cf8d0db7/fundamentals_in_food_service_operations_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/80608665129.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/favutiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44172027-1a55-4e30-b6b2-66f70bd6638c/magnus_chase_and_the_gods_of_asgard_book_3.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/91298057044.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/my_little_pony_coloring_sheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 5456 bytes
SHA-256: 58f5de4f7ca092b0a9d67fd91b901e1cc40437dbd77a0a72905f179d91ffc650
font_01_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 10168 bytes
SHA-256: bd288a9b917b0c2607c438f7ab2e6b11c38cfd02efe1b7fddd15cb465f53def6

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