Malicious PDF — malware analysis report

Static analysis result for SHA-256 9236b1bd233ebe38…

MALICIOUS

PDF

79.7 KB Created: 2021-03-29 13:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6e98a815026d0ce412032db894ffbc38 SHA-1: defd204ca96ed02d339a9b6795dbc3883024b5c2 SHA-256: 9236b1bd233ebe3859fe4cdae2a50bdd918bdab8ae380f9e79b5d4f982650553
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'ponafet.ru/award', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links hosted on disposable domains, reinforcing the malicious intent. Although no scripts were directly extracted, the overall structure and URL patterns are indicative of a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=after+all+this+time+book+pdf+download PDF link annotation
    • https://cdn.sqhk.co/sozonexof/hJhagdu/xajakigogom.pdfIn PDF document text
    • http://chelamela.org/directv_genie_2_status_light_yellowu1s0r.pdfIn PDF document text
    • http://letaraluzim.scienceontheweb.net/47465361827.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/jjidih1/23547168998.pdfIn PDF document text
    • http://guitar.su/675498002839kh00.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/astronomy_today_7th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/kagitenoru/actschh/disorderly_conduct_charge_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/jagjagc/63515016430.pdfIn PDF document text
    • http://passive-income.ru/chemistry_unit_4_test_b_answersjcuih.pdfIn PDF document text
    • https://cdn.sqhk.co/gexedamej/jijigc9/55166243042.pdfIn PDF document text
    • http://negurosivaz.iblogger.org/82370426836.pdfIn PDF document text
    • http://sdek-24.cc/vitebepuluterigpv30.pdfIn PDF document text
    • http://marketes.pro/taylormade_r15_460_black_driverqvu6o.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/pavujiniz/streaming_app_android_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe526634-889c-41b6-b6de-8da2fc351187/does_costco_have_tech_support.pdfIn PDF document text
    • http://pavasokunise.epizy.com/lusakopusibi.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/shark_navigator_dlx_filter_cleaning.pdfIn PDF document text
    • http://tupaguwojisese.rf.gd/joker_board_game_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78795c6e-94e9-449b-900b-81c31a9ea7f5/the_sense_of_an_ending_julian_barnes_read_online.pdfIn PDF document text
    • http://bofidimasep.rf.gd/dimisakesax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6f2b68-b32f-48b6-8b8b-6da94b93bad8/tasezapilokised.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/michel_de_montaigne_essais_english.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_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 5568 bytes
SHA-256: b12b8a2fdd7f179535ac4afad853c1c5e1894b0308bcfb2a993e431a776ec291
font_01_sfnt_off00010ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE9 11488 bytes
SHA-256: e721fdf211cce53ee52808ee3780241a6242454e16ee76e614216f3f10e08025

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