Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1c22e04c88902e…

MALICIOUS

PDF

76.4 KB Created: 2021-03-24 12:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8816f4b73a66cd1ac2ec478869953060 SHA-1: 54a940bbabd2b9b661563abd2ac667f21e170d14 SHA-256: 9c1c22e04c88902ed9ae064a879b78bfc655ac1eb2538d605ee2e49de9bb839d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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.
  • 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://jacksth.ru/wix?keyword=boair+5-stage+air+filters PDF link annotation
    • http://basiditdcf.space/98558044954mxk94.pdfIn PDF document text
    • http://spoonnumberone.xyz/the_raid_redemption_full_movie_download_moviescounterj1lfk.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/the_powerpuff_girls_characters.pdfIn PDF document text
    • http://wisecreditscore.info/99718300378e3sgh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409394/normal_5fc86c3fd454e.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/banking_awareness_gradeup_2020.pdfIn PDF document text
    • https://dapemoko.weebly.com/uploads/1/3/4/6/134647299/wikikorerod.pdfIn PDF document text
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/6854df07f8149df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_60164386cd007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_5fd76c0bc96ba.pdfIn PDF document text
    • http://grizhoff.ru/dragon_kingdom_2020lp17g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482023/normal_602acd27bd8bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423471/normal_6000dae7adaa7.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/24518566196.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/big_data_analytics_in_bioinformatics_and_healthcare.pdfIn PDF document text
    • http://lazadacostumercenter.com/crowder_all_my_hope_karaokeumpr2.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/fezenur/car_rental_agreement_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/how_does_playdough_help_a_childs_cognitive_development.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/duxasizupa.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/2618583381.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/operating_system_not_found_dell_xps.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_off0000eb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB23 5140 bytes
SHA-256: 576ed5dcdbddd1cae6ae8955a336bd7ba6a69d9e2563ff62701c355c98fb9363
font_01_sfnt_off0000fcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 11724 bytes
SHA-256: 4840bab499b0d19c4c53e91335c6de421d1b531209f4e7f0d6dcdea508bec8a3

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