Malicious PDF — malware analysis report

Static analysis result for SHA-256 e441acdee9f8c878…

MALICIOUS

PDF

93.1 KB Created: 2021-03-17 05:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1350f5918ccf83e97d51ef51a1830283 SHA-1: 748058475e3f9d9d30be6c1c703e3635ce1bef9f SHA-256: e441acdee9f8c878b649d7c01c651fe71c478ab9c856d4c4e8aaebe5999a38ef
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dugedepap.ru/123?utm_term=batushka+litourgiya+rar PDF link annotation
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/e7244097304.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/QTpZhf7/lulepatafe.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/igWZL9a/jajerobalosamadiwexabowe.pdfIn PDF document text
    • https://mujavipaw.weebly.com/uploads/1/3/0/8/130874121/tolejukugoladujiwej.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/gggqsFu/bhojpuri_album_video_song_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/jahgSO3/dolphin_bubble_shooter_2019_mod_apk.pdfIn PDF document text
    • http://mifudubesesul.iblogger.org/vofawasupu.pdfIn PDF document text
    • http://��������������.plMembersUnknownIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kenavegolixase.epizy.com/ver_los_rios_de_color_purpura_2_online_subtitulada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8588047f-698a-4a48-b345-947b35942f27/75008488282.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/wubukoteseju.pdfIn PDF document text
    • http://jedugapi.epizy.com/which_university_is_best_for_medicine_in_canada.pdfIn PDF document text
    • http://dojareloz.epizy.com/pigusimuretu.pdfIn PDF document text
    • http://lemaponu.rf.gd/fundamentals_of_astrodynamics_solutions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59fd829d-6286-421f-8e04-e0f8352582d3/algebra_1_online_textbook_mcgraw_hill.pdfIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_63e060668e374bc798daba48c290f6ea.pdf?index=trueIn PDF document text
    • https://87d5e434-dc39-4d64-8681-877d64e204d5.filesusr.com/ugd/5660ac_a584c2dcc252485a853b97aae7639ab2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fefe5eb2-8fc9-4934-805f-6f6f58d790ed/enthalpy_change_definition_aqa_a_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f34ca459-dfe8-4d4f-839d-f7d8b3821fae/zonubiraki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb22a34a-a527-4376-9838-784264f48ed5/46292183632.pdfIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_ba798c9d891f49f7be46fd357893a9c6.pdf?index=trueIn 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_off00011eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB6 5164 bytes
SHA-256: d80cf3650b734cac22ecf716146f6f4fc1a24ccf7db194c3bd07cae972a3e56c
font_01_sfnt_off00013049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13049 19288 bytes
SHA-256: 1e287a00c8e3863357bd3ccf2320646903cb5bba852c326b8c4ce082db8aa352

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