Malicious PDF — malware analysis report

Static analysis result for SHA-256 d868caae7aca9114…

MALICIOUS

PDF

70.9 KB Created: 2021-04-02 00:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b0cc008b4644863b035857f39a7865d SHA-1: 5eb206e1544b196ff812c519eff6fa216143ab70 SHA-256: d868caae7aca9114551ba50b0a7052c3c1ab90f27df0cd311e6411538fbc0ab4
126 Risk Score

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-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://midufefew.ru/wix?keyword=montelimar+nicaragua+resort PDF link annotation
    • http://ejqy.com/decimal_multiplication_worksheets_for_grade_3rkovj.pdfIn PDF document text
    • http://kinerexasuxemo.getenjoyment.net/jirev.pdfIn PDF document text
    • http://vuletotam.scienceontheweb.net/bayesian_probability_for_babies.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/38247059903.pdfIn PDF document text
    • http://gijaninapumobe.sportsontheweb.net/bosaz.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/africa_map_printable.pdfIn PDF document text
    • http://sobokapim.mypressonline.com/cambridge_igcse_economics_workbook_susan_grant.pdfIn PDF document text
    • https://cdn.sqhk.co/bijilixiger/2ihiePq/cross_stitch_ornaments_kits.pdfIn PDF document text
    • https://migawireradafus.weebly.com/uploads/1/3/2/6/132695569/ac20a4283.pdfIn PDF document text
    • http://sudesisobibimit.22web.org/zelawuvoraxu.pdfIn PDF document text
    • https://vazozedirasamib.weebly.com/uploads/1/3/4/0/134013018/51e07cc3.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/jGjihMJ/mashup_songs_lyrics_tagalog_2019.pdfIn PDF document text
    • http://extrameets.fun/6866653392vjdsn.pdfIn PDF document text
    • https://cdn.sqhk.co/nobuwinulad/hzGhffZ/botim_apk_without_ads.pdfIn PDF document text
    • http://raftgjgr.space/free_superhero_ringtones348ol.pdfIn PDF document text
    • http://jedufozares.22web.org/catalytic_reforming_adalah.pdfIn PDF document text
    • https://cdn.sqhk.co/gajamomol/gNHUwha/i_ready_math_book_answers_3rd_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/pubabolab/piShijc/8715682335.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gogujigasad.onlinewebshop.net/delegation_skills_for_leaders.pdfIn PDF document text
    • http://demunoj.epizy.com/dwp_mandatory_reconsideration_template.pdfIn PDF document text
    • http://pimorem.epizy.com/word_search_answers_puzzle_169.pdfIn PDF document text
    • http://lumawasisoxo.rf.gd/96036841698.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_off0000d939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD939 5124 bytes
SHA-256: 5b5a033c928d93cd37192942f5228be35a774e3464653f8834e1b66652a0fee9
font_01_sfnt_off0000ea91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 10532 bytes
SHA-256: 77c04bfd0fc48c24124c270aaf29d6d3e9f28bc1f94ca900a82daedb08131852

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