Malicious PDF — malware analysis report

Static analysis result for SHA-256 705357c7cf2f3e3e…

MALICIOUS

PDF

77.5 KB Created: 2021-03-16 18:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bff209180de55a60608c6754d0babc57 SHA-1: ad37764147dfeee71d3d5178214a945abc78e3dc SHA-256: 705357c7cf2f3e3e6a97a6f049550274f4edff49f7212cf951a57d683d0b8269
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-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://maypoin.ru/wix?keyword=gamecube+game+ids PDF link annotation
    • http://wufamega.scienceontheweb.net/ladonubogaxowesafadenanom.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/kisabixat.pdfIn PDF document text
    • http://cozyplacefor.rest/saber_que_vendras_es_liturgico2dkp6.pdfIn PDF document text
    • http://com-connexion.xyz/banshee_norn_rg1f585.pdfIn PDF document text
    • http://makamar.online/ludigifemuxogavolynzyo.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/pronoun_practice_worksheets_for_2nd_grade.pdfIn PDF document text
    • http://instapriz24.site/best_baccarat_strategy4a5c8.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/what_age_can_you_get_a_learners_permit_in_arkansas.pdfIn PDF document text
    • http://lolkek.xyz/free_spay_and_neuter_events_near_mejzdpe.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/how_to_write_on_a_file_for_free.pdfIn PDF document text
    • http://meblik.su/mewubeiqnez.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/6150397631.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/little_big_shots_australia_2018_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/kapejuzuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8cc52b3-9fcf-4757-a9bf-64f9e0bb9bc6/jalunide.pdfIn PDF document text
    • http://gajopule.myartsonline.com/gitudenu.pdfIn PDF document text
    • http://muvipej.atwebpages.com/kabbalistic_magic.pdfIn PDF document text
    • http://fatavetotujel.onlinewebshop.net/vewetabameti.pdfIn PDF document text
    • http://mojenuj.atwebpages.com/go_math_practice_book_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/pikisekuzetir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e587c58-c3db-456e-ba68-35cf1dea32bf/42717559687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da1e2f4-2506-4833-b1f7-35a68722f68c/66962719470.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_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 5300 bytes
SHA-256: a912ea312942fa53668f9ca9cd13a0bf9865d39f4621c59198813b538dab99f9
font_01_sfnt_off00010187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10187 11512 bytes
SHA-256: fa39c4787f8083de189566792c90d464c4c5dd207bcb8cae392da93109d64876

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