Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d72bd1ebced6250…

MALICIOUS

PDF

87.4 KB Created: 2021-05-11 06:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 97f6a9d2d9f702f0aa6a10743afeda8f SHA-1: d4bd3f9deb4e21013088af65f701770ba7993928 SHA-256: 7d72bd1ebced6250e5f0bf1d71992b290ce864b9601525aeb8ec32c4bd6b2fe3
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 0.9993

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://nipisod.ru/strik?utm_term=nursing+behavioral+interview+questions+and+answers+pdf PDF link annotation
    • http://manibupefif.mypressonline.com/candidose_cutane.pdfIn PDF document text
    • https://dixotusokor.weebly.com/uploads/1/3/0/9/130968976/bufanagugam_bavefup_gelunawevudeko_kutumepumu.pdfIn PDF document text
    • https://cdn.sqhk.co/dedomafub/icijidq/40253478206.pdfIn PDF document text
    • http://nositadox.mypressonline.com/all_my_sons_litcharts.pdfIn PDF document text
    • http://kekewawoxugar.sportsontheweb.net/beginner_s_mind.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/34671225739.pdfIn PDF document text
    • http://gugezebaz.mygamesonline.org/list_of_cabinet_ministers_of_haryana_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/gg8MYha/46342677898.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/7ihYSMg/tales_of_crestoria_characters_tier.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/maxeredit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_6040bef21abf2.pdfIn PDF document text
    • http://womovenum.sportsontheweb.net/lenefixinitobiravaveruw.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/unspoken_feelings_of_a_gentleman_ii_pierre_a_jeanty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488566/normal_6063af819c3d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_606199ec3d747.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/21049510546.pdfIn PDF document text
    • https://baxawomegofagu.weebly.com/uploads/1/3/2/8/132815114/xiwexefi.pdfIn PDF document text
    • http://gikodarekegov.mywebcommunity.org/96044505421.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/ihbBhik/street_fighter_4_full_apk_free_download.pdfIn PDF document text
    • http://lagulesuko.medianewsonline.com/bubuxesi.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/cbse_board_class_12_biology_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jonesojawu.myartsonline.com/agile_software_architecture.pdfIn PDF document text
    • http://fijorolur.myartsonline.com/bodexorudejer.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_off0001174f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174F 5688 bytes
SHA-256: f7dd4aaf2b9092962acd7e0b833cda52184b23a252c36220df7437b2f412fffb
font_01_sfnt_off00012ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB1 11176 bytes
SHA-256: dd05cc6ddb20f6283d17015a2e7babb1b8ffd955f5dfa98f77f22b941f3669e3

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