Malicious PDF — malware analysis report

Static analysis result for SHA-256 07097c26976c8c60…

MALICIOUS

PDF

85.1 KB Created: 2021-03-10 22:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2b462828e3b1e946221a38463d210696 SHA-1: 80befe857fb53ff5fd508515b314d72f677cb317 SHA-256: 07097c26976c8c6026b089f91c2cfa9857d21783758c363a2fc87d7a4d6cf233
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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 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://botokaw.ru/123?utm_term=html+templates+for+portfolio+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471250/normal_5fed60b333449.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/zanawariranatedogev.pdfIn PDF document text
    • http://patedeziw.mypressonline.com/25472592308.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/xjjidja/63564873508.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/how_to_get_google_maps_to_update_street_view.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/examkrackers_mcat_practice_tests_reddit.pdfIn PDF document text
    • http://fabujisaw.mygamesonline.org/pedagogical_approaches_to_teaching_english.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/why_does_my_cctv_dvr_keep_rebooting.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421464/normal_5fe363e6770a2.pdfIn PDF document text
    • https://cdn.sqhk.co/rizuwevize/Qns4jgg/xofilodujovolazudebegerel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448339/normal_5ff8591fa76be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453888/normal_5fe6b0e484a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_6021bdc09b7a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_6007650105885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_600eacd174b91.pdfIn PDF document text
    • http://bufezipuduxev.mywebcommunity.org/76742683775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448126/normal_6046421b603fc.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/gavapozalilup/photo_editor_apk_for_android_4._0.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/stephen_king_twitter_kayleigh.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/87873813904.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_off00011265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11265 5008 bytes
SHA-256: faef738e187ec2d072f5772e523a0fccc02892854a0c4ed6cabd3cbe80b227ba
font_01_sfnt_off00012351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12351 10492 bytes
SHA-256: 4b7265cac5783f8ee07a1129794d77fe7f34ac74a2dfd22634a686e3c1316b91

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