Malicious PDF — malware analysis report

Static analysis result for SHA-256 008b0e7f0096c013…

MALICIOUS

PDF

77.1 KB Created: 2021-04-01 15:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3d3df463d0053f16442c97784f3bc932 SHA-1: 9ef450a573ad847f7e8922cce5adffde986ef370 SHA-256: 008b0e7f0096c0137d4599ea6ecaf37d6d3a7f2574f06248d921bd15e857f868
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 0.9996

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://xajibur.ru/wix?keyword=canvas+cnusd+santiago PDF link annotation
    • http://otomail.business/math_brain_teasers_for_adultst839r.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/69680278684ln8zs.pdfIn PDF document text
    • http://seomagnat1.online/x-men_apocalypse_dublado_online_gratissi84s.pdfIn PDF document text
    • http://douchehq.xyz/insignia_ns-str514_bluetooth_pairinggvyu3.pdfIn PDF document text
    • http://demask.space/famenujarajupiwatuds6940.pdfIn PDF document text
    • http://grandov.pro/98974730687i981q.pdfIn PDF document text
    • http://top-salez.site/forest_wallpaper_powder_room6ln4b.pdfIn PDF document text
    • http://detirago.iblogger.org/arya_samaj_history.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/f1303c5f-9585-442b-9ab9-85710d68661d/the_time_travelers_wife_end.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_9c7e1ffd45eb4d33a2bf5ed965ddcb91.pdf?index=trueIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_ee7fdfa4f74a493b9843c269a5722178.pdf?index=trueIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_d6d0aafe76774f00acb8e657c821f58b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/wasumujubodiwevimonup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8632f573-830c-41b7-846d-c210264d33d0/rawirugewilafalitobo.pdfIn PDF document text
    • http://jenulozamaberur.epizy.com/what_does_kill_mean_in_town_names.pdfIn PDF document text
    • http://vozovowu.rf.gd/71518707877.pdfIn PDF document text
    • http://gadudadu.rf.gd/gevolitiluge.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/remove_dotted_lines_on_excel_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d08231-a5bf-4d33-9d05-e6573a404c05/22382561725.pdfIn PDF document text
    • http://lafatakijuton.epizy.com/sewing_machine_parts_and_functions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dee34dc-4663-49c6-9be2-3be1573ad1bf/how_did_you_spend_your_summer_vacation_for_class_4.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/48304127916.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_off0000f151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 4944 bytes
SHA-256: 9abe645f2056ca7e15284f8ffe8be6fa416eb2e16a3717a8ff81b5a0bf77d027
font_01_sfnt_off00010239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 10848 bytes
SHA-256: ce57ccd95c5cec85ec267efe0a9d8e3d4b9f1d929f8ae71339af1e71ede56c8b

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