Malicious PDF — malware analysis report

Static analysis result for SHA-256 4586831b1cc4cc8d…

MALICIOUS

PDF

75.3 KB Created: 2021-03-20 21:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 627304d019c853b16e2f0107b231945d SHA-1: 8eda9fc493e489866af742b05f24295891d563e3 SHA-256: 4586831b1cc4cc8d06cddcff1b4309c60cc3fa4ab40dddf6e4bbc1cd5ee5c201
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 0.9998

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://jottigo.ru/wix?keyword=castle+clash+hack+apk+2020 PDF link annotation
    • https://cdn.sqhk.co/tajudozizif/AGzLcjd/transferwise_money_transfer_rates.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454999/normal_6049b17688e87.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/Bmife7f/retro_gamer_gifts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5fe74f74a37bf.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/iste_standards_for_students_and_educators.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444353/normal_6009c07e70271.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470224/normal_600169c1c006a.pdfIn PDF document text
    • http://dowotezovemalo.mygamesonline.org/assignment_problem_example.pdfIn PDF document text
    • https://cdn.sqhk.co/madosodu/bJER4ge/statistical_outlier_formula_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/jcYhC8O/easylife_rechargeable_hearing_aid.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/ji3ghjh/dining_room_furniture_sets_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/esjehgv/pinball_hall_of_fame_the_williams_collection.pdfIn PDF document text
    • https://cdn.sqhk.co/digipexula/ijhJVje/how_do_you_draw_gacha_life_hair.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e0b0bd2-81da-4724-8224-7c6d65e23a56/kubopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b03acf-3b6e-4218-9877-0b50f899c314/review_delonghi_ec702_15-bar-pump_espresso_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c38cc8f4-347d-431a-a13a-4c1678a0217e/panasonic_uk_head_office_phone_number.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/castillo_en_el_aire_libro.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/bpdb_job_circular_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9771bd63-e211-417a-bdad-b8f4654b5984/35772007825.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_off0000e7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DB 5168 bytes
SHA-256: cb19522f2932892dbecef01ff1725bb7f760780e5a6d80c24ca2ada019db8c2c
font_01_sfnt_off0000f96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96D 11348 bytes
SHA-256: a211a908ff6a3cec37fb039265f93fa6bc44f722fc40426ca2ee5fee4f96c843

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