Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa7227b41ad6b78…

MALICIOUS

PDF

92.1 KB Created: 2021-03-15 20:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: acbf02877ef5c313ce035aaa1074a8c9 SHA-1: 589a00c8040f6f655b2144ca5a44465014cfe212 SHA-256: 9aa7227b41ad6b7836232ae0c18939399b692bd99c444de19e23e165f75feb22
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URIs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://kuzutuzo.ru/aws?utm_term=phonemic+awareness+smart+board+activities+kindergarten PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369659/normal_6019102b6ed03.pdfIn PDF document text
    • https://cdn.sqhk.co/ziratede/YQ1UDAS/ver_mi_saldo_at_t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415061/normal_6038fb09250ec.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/368Kjap/minecraft_new_update_2020_game.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/dilavovewa.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/wopafovobuxamu.pdfIn PDF document text
    • http://seweripuwas.mywebcommunity.org/12656927767.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/pigkAIK/dude_perfect_gaming_channel.pdfIn PDF document text
    • http://dakajak.medianewsonline.com/allahabad_high_court_aro_syllabus_2020_download.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/smart_watch_u8_bluetooth.pdfIn PDF document text
    • http://wijofotezopadik.medianewsonline.com/58113820840.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/jq2aP7i/jungle_marble_blast_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jiloduvunilu/jcTihje/word_cookie_answers_honey_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_604eb30718565.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/whats_the_best_app_for_free_music_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rinimodosejowuf.myartsonline.com/dragons_of_autumn_twilight_reading_level.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/how_do_you_make_bookmarks_in.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/adjusting_journal_entries_in_quickbooks_online.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/stanley_jump_starter_1000_instructions.pdfIn PDF document text
    • http://dekuroveki.rf.gd/california_secretary_of_state_form_llc-_2.pdfIn PDF document text
    • http://pukuwatisapejo.rf.gd/39845534459.pdfIn PDF document text
    • http://magovinirubow.epizy.com/lukoz.pdfIn PDF document text
    • http://vuxepogi.atwebpages.com/black_hawk_down_book_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAED 5680 bytes
SHA-256: bbfeb6339600cd21533aeac9f76ec918d7d2df48861307306d76d3c7e4b753cd
font_01_sfnt_off00010e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1D 4800 bytes
SHA-256: 6d7e171e793725e86aa999100e69168c46c60223f4f40200f811b8b23cb2c53f
font_02_sfnt_off00011f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F92 10712 bytes
SHA-256: a44ad50f0dd386f6fab22e80e45e2f9aea1ab5cf62ebe608b9a0f2eb2b3634ef
font_03_sfnt_off0001446d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446D 16388 bytes
SHA-256: 427558651cc0f5bb9ab1f262449aa9ead0e76e269d5605724c79589a4c58aef2
font_04_sfnt_off00015a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A41 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d