Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5b9d30666cbd6d…

MALICIOUS

PDF

78.7 KB Created: 2021-04-06 12:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 117ecaca23d98f002e9edea696c9714b SHA-1: 971161eb05f8e88ffb641a65adedbb6b2916dd1d SHA-256: de5b9d30666cbd6d475d41f86c29db60003c432c2612f937888dc09a1760e867
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of external URIs and the overall detection points to a phishing attack disguised as a fitness article.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/strik?utm_term=does+stretching+help+sore+muscles+after+working+out
    • http://dizititakozazi.mywebcommunity.org/3838680938.pdf
    • http://fagumawegoleleb.mypressonline.com/affidavit_of_relationship_sample_letter.pdf
    • https://cdn.sqhk.co/mujowofapubi/iE8nt76/bollywood_party_songs_2019_mp3_free_download.pdf
    • http://femonejigajape.mywebcommunity.org/bejupurekadezugiwewiruj.pdf
    • http://daxamel.mywebcommunity.org/makeup_artist_cv.pdf
    • http://xadexawufomovi.sportsontheweb.net/taoism_holy_book.pdf
    • https://cdn.sqhk.co/tedavevata/igKhjgj/interpreting_remainders_word_problems_worksheet.pdf
    • https://cdn.sqhk.co/noligigibar/MhakjeS/best_off_road_adventure_motorcycle_tires.pdf
    • http://waparudadip.mywebcommunity.org/51793877110.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tiniruru/97328657512.pdf
    • https://s3.amazonaws.com/sowewazulejewi/pioneer_avic-5201nex_password_reset.pdf
    • http://sazebufaz.atwebpages.com/68369114599.pdf
    • https://s3.amazonaws.com/woxojuxafopuv/darkshore_classic_leveling_guide.pdf
    • https://s3.amazonaws.com/xarojapi/adventure_game_for_android_mobile.pdf
    • http://bogalibamadom.myartsonline.com/asus_m4a785td-m_evo_drivers.pdf
    • https://s3.amazonaws.com/xowasosuf/alitalia_uniform_neu.pdf
    • https://s3.amazonaws.com/gasodamuza/91264976988.pdf
    • https://s3.amazonaws.com/fejififimaketo/bopikerokazotodipupinilux.pdf
    • https://s3.amazonaws.com/sepovutapakogaf/t_v_d_full_form.pdf
    • https://s3.amazonaws.com/wulotugadag/mopekuzigi.pdf
    • https://s3.amazonaws.com/rizijubovapuk/taylormade_r15_430_driver_specs.pdf
    • https://s3.amazonaws.com/wifiduxezo/libro_de_balance_de_materia_y_energia_felder.pdf
    • https://s3.amazonaws.com/libusamagowuvo/free_mid_autumn_festival_images.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_off0000f668.bin
f31b6501b460d7927dca73241b2097c98df06440ce7762b468bfac2b6bc16466		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF668 5584 bytes
font_01_sfnt_off0001095a.bin
6a63dae4ebaba6774e967268956ca7f3ff9824347786a604ec43fc32698acc24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1095A 10608 bytes

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