Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0b6a86ff876178…

MALICIOUS

PDF

79.6 KB Created: 2021-03-31 23:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f40afbb61c6a143a3815ed8ed0fb187d SHA-1: 81c6489d9044a3be494df85cd9e136563c66b3f5 SHA-256: ad0b6a86ff87617880878c618cc2dc088cce17e4df0b8fa7a53c006757db25d8
126 Risk Score

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 0.9992

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://jottigo.ru/wix?keyword=8+ball+pool+hack+mod+apk+4.9.1+download PDF link annotation
    • http://reggis.info/10382897366zqzbb.pdfIn PDF document text
    • https://cdn.sqhk.co/tibatojo/ewcdGhb/28814298645.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/latest_update_avast_antivirus_free4o8tq.pdfIn PDF document text
    • http://tafakiduwav.scienceontheweb.net/ptolemy_geography.pdfIn PDF document text
    • https://jipunexekamu.weebly.com/uploads/1/3/4/5/134588935/musamekebepelibezaf.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/imfgfwB/download_total_conquest_mod_apk_offline_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/ssjbKgg/glutathione_business_opportunity.pdfIn PDF document text
    • http://sakhavto.ru/zoxubakinotofanasoxirizanfugut.pdfIn PDF document text
    • http://damvglaz1.xyz/an_astrologer_day_story30l1i.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/solorivapelozezugade.pdfIn PDF document text
    • http://good-production17.site/plague_inc_tips_brutalj43zr.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/fifviiu/numeguxabijawuxej.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/41775981692.pdfIn PDF document text
    • http://hookup755.fun/direct_speech_into_indirect_speech_worksheets20cca.pdfIn PDF document text
    • https://dulumomotuvubu.weebly.com/uploads/1/3/4/7/134759228/pezibutu.pdfIn PDF document text
    • http://iblack.space/how_to_use_amazon_echo_show_5_cameram7714.pdfIn PDF document text
    • http://normal-id.com/verbos_regulares_e_irregulares_em_ingles_mais_usadossvudb.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/capital_structure_decisions.pdfIn PDF document text
    • https://ruvawuwejijexut.weebly.com/uploads/1/3/0/8/130814193/xevunobawazexew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_7b58e5782fc74a86873932283568ac18.pdf?index=trueIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_9b3a59037c8d4916aa272c854f9f4ed9.pdf?index=trueIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_b4eac57386db4a53b3fcf5e3658f703c.pdf?index=trueIn PDF document text
    • https://89e1056b-8c01-44a4-bea5-a80a497d444f.filesusr.com/ugd/6db6f7_17f0dfb71a4b4743b6da5acf041e5133.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_off0000f5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B8 5764 bytes
SHA-256: 116867f08b57f2b373710d6abd2eeca109bbd194976b3fc41d89bd6309c31149
font_01_sfnt_off00010946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10946 11484 bytes
SHA-256: 9b566d3c3f401a2fe7acf42bf411b0dc2bca96c803bb7c5cfe977c87b3048698

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