Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ddb9dd3bd62364…

MALICIOUS

PDF

71.1 KB Created: 2021-02-21 19:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a0678bc159e9f05cd8c9f8749b34aa71 SHA-1: 4b906c782e229912b184612966886a275b49175f SHA-256: c3ddb9dd3bd623646f93cc3fa1e566b1d8eab42d60b447c72c7964df29c34ece
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains keywords related to games and guides, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=hack+dragon+city+2020+ios PDF link annotation
    • http://nevogixire.22web.org/azur_lane_victorious_guide.pdfIn PDF document text
    • http://cashtanks.fun/center_align_form_in_htmlalepd.pdfIn PDF document text
    • https://cdn.sqhk.co/kidimezamos/F3oPiaB/stick_hero_fighter_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/VhdONjf/i_wish_you_were_here_quotes_for_her.pdfIn PDF document text
    • http://trokot-shopnew.online/performance_comparison_cpu9a0vk.pdfIn PDF document text
    • http://nicechange.space/jaxazobozipevaparugusogom3nvx.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/6110758.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/nozusi_loduralobuletes_lupomu.pdfIn PDF document text
    • http://tuvawom.iblogger.org/best_gift_for_teacher_appreciation_day.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/fupelifox.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/icgcibo/crafters_companion_build_a_block_dies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fcf07760b171.pdfIn PDF document text
    • https://palotuzumi.weebly.com/uploads/1/3/5/9/135991270/wujukerebis_rolox_jezezixedep_bimerusewiwezo.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/cgcngie/83963026504.pdfIn PDF document text
    • http://nibumuxadata.66ghz.com/japonobevapobixa.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/ikDhhIW/tafumi.pdfIn PDF document text
    • https://cdn.sqhk.co/xedasuzefer/Borgdhh/21273439878.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/hjgXwje/police_vs_criminal_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wusasozomumag.epizy.com/bypl_new_connection_form.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_off0000d880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD880 5476 bytes
SHA-256: c9bbf5c6ad46c916219368fb15da0b866dada59fed1cf15e7cb8533593827c77
font_01_sfnt_off0000eb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB37 10848 bytes
SHA-256: 2be9888b0d1143b07551546f4f05673b8f9b7194bdadba8206de2b813cb49d3f

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