Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf23d41026b1b1f…

MALICIOUS

PDF

79.9 KB Created: 2021-03-11 16:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f024f4403035b9cdcac3c35a46663e07 SHA-1: 1462f13893b3a1ffe73e9bbee34baa1902ffd336 SHA-256: faf23d41026b1b1fc2af8b15258a84a84dc7d89559a79275db571754c062dbf7
136 Risk Score

Malware Insights

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

The sample is identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating it is an advance-fee scam. The embedded URL `https://resalured.ru/strik?utm_term=scholarship+essays+for+high+school+students` is likely part of the lure to trick the user into proceeding with the scam. No scripts were extracted, but the document structure and heuristics strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=scholarship+essays+for+high+school+students
    • http://mexuzekinukogip.iblogger.org/what_is_great_depression_class_9.pdf
    • https://cdn.sqhk.co/tomubozes/irvAgj1/34311667535.pdf
    • https://cdn.sqhk.co/gutinisiv/fthhrgg/48412921631.pdf
    • https://cdn.sqhk.co/dutudovajud/jcYigje/faladitanugifetizijoku.pdf
    • https://cdn.sqhk.co/tusufawenu/f2hjex2/74997002489.pdf
    • http://fakaripeti.xyz/208404420cnqjs.pdf
    • https://cdn.sqhk.co/xolovagi/pvgfijO/zombies_2_songs_lyrics_download.pdf
    • http://openplafond.xyz/65414542211vlaur.pdf
    • https://cdn.sqhk.co/vimerokil/LxvK6ja/fit_the_fat_2_mod_apk_1._3.pdf
    • http://soldatskaya6.ru/jitidinuzomuwapoxizimunofvhkzk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lixasifasi/benji_brothers_trending_topic.pdf
    • https://s3.amazonaws.com/rafiralexezol/asciidoc_cheat_sheet.pdf
    • https://s3.amazonaws.com/remuv/foxit_reader_for_win_xp.pdf
    • http://vidodusiv.epizy.com/xududi.pdf
    • https://s3.amazonaws.com/jojitagifuva/basilebunuwubusunolakun.pdf
    • https://s3.amazonaws.com/pojikovewijeja/wukoxasikesepekunawes.pdf
    • http://xiluwudikipo.epizy.com/85916327704.pdf
    • https://s3.amazonaws.com/nakuzafol/how_to_make_a_homemade_flamethrower_out_of_household_items.pdf
    • https://s3.amazonaws.com/figugipopar/powerpoint_template_free.pdf
    • https://s3.amazonaws.com/bulozor/38952927313.pdf
    • https://s3.amazonaws.com/regegozumekoza/sample_case_study_interview_questions_answers.pdf
    • http://koxujitedosu.epizy.com/applications_of_ampere_s_circuital_law.pdf
    • http://tedijafubivot.epizy.com/tupewuxuk.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_off0000f9ec.bin
42443f3f092bafc08da18b007d1d9723d1317764ed1acb2a7482b519f652d2a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EC 5620 bytes
font_01_sfnt_off00010d0f.bin
44f2f971912eae5090e99b0d56038e49a44f27b466c82e67e1b78968b8ab83ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0F 10796 bytes

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