Malicious PDF — malware analysis report

Static analysis result for SHA-256 0198498279c1a6a0…

MALICIOUS

PDF

77.4 KB Created: 2021-04-06 01:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 35ad46d4da158034c769b56a845aa2c1 SHA-1: caa1505302e9ef32b236a81f9332d99ab674759b SHA-256: 0198498279c1a6a0280ba4af8a65d145114e3dc287878ba8c515ebb07139b35c
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=sketching+graphs+of+quadratic+functions+worksheet PDF link annotation
    • http://mawosatejojeka.sportsontheweb.net/zifanaxefaporonutuvopiw.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/zcgcgaA/super_wings_character_who_israel.pdfIn PDF document text
    • https://cdn.sqhk.co/dawadetugas/jhj3YC1/jelekanokoreloxodibi.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/what_is_a_supply_chain_performance_management_system.pdfIn PDF document text
    • http://jumovuv.22web.org/18299739508.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/gihgPjh/34623871182.pdfIn PDF document text
    • http://fosafurulit.iblogger.org/excel_data_analysis_for_dummies.pdfIn PDF document text
    • http://lesimuzonu.iblogger.org/attack_on_titan_4k_wallpaper_android.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/7038d01e-e877-4d40-9485-587b01473937/christmas_pudding_song_lyrics_printable.pdfIn PDF document text
    • http://fazafowunop.epizy.com/gogimugex.pdfIn PDF document text
    • http://kuderegeguf.epizy.com/65153597125.pdfIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_2f96830563fe445481e5613574651fa5.pdf?index=trueIn PDF document text
    • http://pixutuvaw.rf.gd/free_printable_bubble_answer_sheet_1-100.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_a88d0aa8d18f4d2fb1121d189539ead6.pdf?index=trueIn PDF document text
    • http://wugadavax.epizy.com/seventh_day_adventist_zulu_hymnal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08dbf66a-0c88-4a4c-bc55-18175bc89858/razitafifidises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f03933-3c9c-42ef-94c5-2d2d2f0c842d/how_to_clean_eureka_forbes_water_purifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efadf756-8625-41e2-9c42-79b00d676edb/sipafifik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722fbd63-3cbd-47ea-acb5-dbbf8262cc91/livudugawoviroto.pdfIn PDF document text
    • http://xifusejikudit.rf.gd/vadoji.pdfIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_a2d37aa8a04e47a7bd29e7c39150cd89.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 5772 bytes
SHA-256: 8c5da1578eea348a6f7f63e3f636a696264c5d182baa9837697897efd1087ca6
font_01_sfnt_off0001032b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 10888 bytes
SHA-256: 51a21877e0e455613e407775aada9162f3fba672448a395e18c299e81925631f

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