Malicious PDF — malware analysis report

Static analysis result for SHA-256 faee9685990a5ada…

MALICIOUS

PDF

73.1 KB Created: 2021-03-21 04:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5586943b99efd9c107cd9b0755caecf9 SHA-1: 34a261095c43f489018cec8a974b9454da1d89ec SHA-256: faee9685990a5adac188e837a88becee761010c8982289fbeff7df05fe7f8715
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://seumenha.ru/wix?keyword=mathfunbook+answers+grade+8 PDF link annotation
    • http://larekew.mywebcommunity.org/possessive_pronouns_worksheet_for_grade_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421472/normal_6053c72fc40a9.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/34ee459792b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476765/normal_60023b1292433.pdfIn PDF document text
    • http://leledup.mypressonline.com/which_weight_goes_where_on_a_grandfather_clock.pdfIn PDF document text
    • http://tehnikator.ru/dell_colour_laser_printer_1320c_troubleshootingjkb9u.pdfIn PDF document text
    • https://xexewajadet.weebly.com/uploads/1/3/4/6/134651298/jovadorot.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/d_d_5e_descent_into_avernus_download.pdfIn PDF document text
    • http://terakusinuw.mypressonline.com/kufegasedume.pdfIn PDF document text
    • https://vatanivirasuta.weebly.com/uploads/1/3/5/3/135387760/3627758.pdfIn PDF document text
    • http://beststudent.fun/pezazofupeteh6des.pdfIn PDF document text
    • http://kokulotasuz.mygamesonline.org/31351827147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418963/normal_5fe8e5fa61dd1.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/easy_way_to_learn_english_grammar_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_603730466f299.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5ffa11ce96945.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nononulavojiki.myartsonline.com/15587844121.pdfIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_77f1280de86648d999ee3e391ec79701.pdf?index=trueIn PDF document text
    • http://nanaxidimidi.atwebpages.com/tarikimudonedamuvome.pdfIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_af78e58038bc48b08e601a22dbed3996.pdf?index=trueIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_12e1937bea3c4502aaeb05fa81fd0ef9.pdf?index=trueIn 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_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 5632 bytes
SHA-256: c47cf776e236780b15cd50cd28512eb311cbbaa4e43fb7c4452a4889938e3e53
font_01_sfnt_off0000f0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 11288 bytes
SHA-256: 55c54d8420fcb376f2aad820263d3206eafc911c7caed97d4a4f819f9e48a346

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