Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebcc508b36203161…

MALICIOUS

PDF

69.8 KB Created: 2021-04-07 08:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: accef4763e97d57f8644e354b2355d7c SHA-1: 584cd18e571b8f2f267d4da3e3b60bda892dcf7c SHA-256: ebcc508b36203161c577d69450f3d39d884035f06de227bf8530290b58cc5225
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'maypoin.ru', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to be a deceptive lure related to educational materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/award?keyword=benim+hocam+ayt+edebiyat+video+ders+notlar%25C4%25B1+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495841/normal_6005e68cdcfe2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5fc74f6911a96.pdfIn PDF document text
    • http://my-favshope.online/taxodifofavuxugumifutejoh98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_6047bc750d3cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456393/normal_605ae263eab48.pdfIn PDF document text
    • http://sevastopol.sale/the_original_odd_couple_tv_show_actors6funt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424672/normal_60391ca23cf13.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/water_supply_and_sanitary_engineering_s_c_rangwala.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/24795706916.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/complete_guitar_chords_book.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/cardiopatias_congenitas_acianogenas.pdfIn PDF document text
    • http://discount50it.pro/gitubesadirupuvejamunilkazvg.pdfIn PDF document text
    • http://blacklaser.ru/mekifutfol81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sojusenetuki.onlinewebshop.net/77060105581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12697f3-e62d-4cd1-9eaa-ee71f5222b4e/bsa_camping_merit_badge_requirements.pdfIn PDF document text
    • http://vavadot.onlinewebshop.net/top_ten_operating_systems_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646aacee-d9f9-4aed-aa31-6ccdfdad0bc6/66532553426.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/gatipiwexefafe.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/nebupobigokakituviwamut.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/crestline_weather_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0328f31-c03f-4b2e-98cc-ac5415d75535/learn_how_to_trade_options.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/wagutususobamamola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0acc6230-640b-4fd9-acd9-6fcc202a5c2e/book_valley_of_the_horses.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_off0000cdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC7 5780 bytes
SHA-256: a387ffcc13b17920ab1662badc4a1d42a8d6755cdb33dda15a1db2abc9bc4c98
font_01_sfnt_off0000e15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15A 12136 bytes
SHA-256: 6cf91e4290d0f95454fcf3ce315d729f56aba1f34e103f4a14404ba8dbd3272a

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