Malicious PDF — malware analysis report

Static analysis result for SHA-256 df73b6b8ede55455…

MALICIOUS

PDF

83.4 KB Created: 2021-02-20 01:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fad1b596e55d128ad44fe4650e21c49c SHA-1: 589fc5786ff00efb82d74cd5861a7975fcfbcfb8 SHA-256: df73b6b8ede55455c5cd05df8c4d0714f416d6d23890b2c4d4108157972b3ab6
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://seumenha.ru/wix?keyword=analytic+trigonometry+calculator', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Analytic trigonometry calculator', which likely serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=analytic+trigonometry+calculator
    • https://cdn.sqhk.co/tememagitapo/jbyjdnh/marco_s_pizza_nutrition_thin_crust.pdf
    • https://cdn.sqhk.co/puburasar/CicnCdl/23698377984.pdf
    • http://xipulax.iblogger.org/63874313027.pdf
    • https://cdn.sqhk.co/jivomawufem/hdJXw9S/business_indonesia_magazine.pdf
    • https://cdn.sqhk.co/pefisemise/eVkge2N/bingo_blitz_cheats_coins_credits.pdf
    • https://cdn.sqhk.co/novigigexuxo/difFrpV/gumball_machine_maker.pdf
    • https://cdn.sqhk.co/bazexolareja/iUBdjb4/nwsl_fall_series_format.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gomitobovuni.rf.gd/kajogemirame.pdf
    • https://s3.amazonaws.com/wekibik/acog_pregnancy_and_exercise_guidelines.pdf
    • https://s3.amazonaws.com/solonebosop/inclined_plane_problems_worksheet_with_answers.pdf
    • https://s3.amazonaws.com/dutuzanob/advanced_maths_book_for_ssc_cgl.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/battle_realms_free_for_windows_7.pdf
    • http://detekoxinusogux.epizy.com/nijubemovamutumixeriwad.pdf
    • https://s3.amazonaws.com/werowibovezoje/90467554399.pdf
    • https://s3.amazonaws.com/dujepav/sperm_cryopreservation.pdf
    • https://s3.amazonaws.com/vibuvomomuv/isometric_and_oblique_projection.pdf
    • https://s3.amazonaws.com/jafujasiwetid/lacassine_pool_fishing_report.pdf
    • https://s3.amazonaws.com/tesodagiwor/samajurelakogivumalelu.pdf
    • http://patabajisof.epizy.com/zigivupupulizetizedoraw.pdf
    • https://s3.amazonaws.com/futamo/reginedesoza.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_off00010b28.bin
dfb72a50fa5bc79d49c7e60cfd071456dbe0868355f82c893fda3f31e2398c78
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B28 5032 bytes
font_01_sfnt_off00011c3b.bin
b32a2608471ef25c85bfcc5f2b1c0fab79923c3c54aa0c029d324de953ff89ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3B 10616 bytes