Malicious PDF — malware analysis report

Static analysis result for SHA-256 7874d019f7262b15…

MALICIOUS

PDF

74.6 KB Created: 2021-04-23 16:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d746e8298399a714081446b8eec71aed SHA-1: dbc2d212b9579d6c21c584b5cc56d7da527493f2 SHA-256: 7874d019f7262b1561db807dad97c61109f8bbc78ddfdcaec846165be7d67886
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9996

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://midufefew.ru/strik?utm_term=teacher+created+materials+inc+answer+key PDF link annotation
    • http://summ-ita.space/noxufejuwasur3p485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_6022296628846.pdfIn PDF document text
    • https://cdn.sqhk.co/todezuzutito/ZqjgA4m/bible_study_on_faith.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/Nhhggt2/dirusixuneb.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/fT4ifTl/civil_war_pictures.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421061/normal_5ff36fb5ad600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5fd8e34556c7b.pdfIn PDF document text
    • http://logoped-samara.ru/56281075852xa6qo.pdfIn PDF document text
    • http://lynciguest.com/los_anunnaki_libro0zcu8.pdfIn PDF document text
    • https://cdn.sqhk.co/kunagukojoxu/YMo6nSv/50706169427.pdfIn PDF document text
    • http://indonesia2health.online/63427321341yg87f.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/dZXUsjh/gunship_battle2_vr_mod_apk_unlimited_gold.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391335/normal_60153b7fcc759.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/konica_bizhub_c224e_driver_macchgu0.pdfIn PDF document text
    • http://autobuff.xyz/what_color_is_gm_power_steering_fluidlethq.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/dr_khader_vali_books_in_english_free_downloadf8gti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b856ca08-71ba-4400-b41d-3e1b391e5a63/rugiterugejef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e15d276-fe17-41a9-a1fa-92ff817ce5fc/995935036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6008c079-fd99-476e-83e1-a4757ac716dd/58984606743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c6f33c-2f2d-46d9-a1e3-f8b525845f99/wiwopopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4d79cc-5626-46c5-bc80-9a039b9a8f31/5599675756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349cf163-2e60-47e6-bdb8-e2a414f20ee1/how_to_do_ppt_presentation_in_google_meet.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_off0000e659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 5384 bytes
SHA-256: 0bcb3b9ac316e14aa6753c44ab8a776ec18add7db65b850a52538d79eaa69ed1
font_01_sfnt_off0000f88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88E 10708 bytes
SHA-256: 64007fb18a2c3b1bc937f487c20be7cb864c8ed74d7689ae8c2af6195048b8fe

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