Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cc3027bc008846…

MALICIOUS

PDF

107.5 KB Created: 2021-03-24 07:15:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 17f04b086fa8f47f652b97a54292d1b0 SHA-1: 214eb9b5d6d1313d3f8163e759fceb97b38c9fa3 SHA-256: 63cc3027bc008846304412a55e9d86bfe2aa71b2d2fb38b4f110e4eda2fcfd9c
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 0.9992

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://xajibur.ru/123?utm_term=adblock+safari+12 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5fd7af9f44281.pdfIn PDF document text
    • http://rankingcoach-seo.com/20859040031dm3s2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_604008d42fe0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_5fd9755f15182.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvuwoki/QQqjav4/rivexidewetudujugiji.pdfIn PDF document text
    • https://cdn.sqhk.co/pujalabasi/dh4idjj/56765044479.pdfIn PDF document text
    • https://cdn.sqhk.co/madobeborozu/hhjFjda/saxopesovodotabirudidatak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492897/normal_602b9e10cb932.pdfIn PDF document text
    • https://cdn.sqhk.co/zafazegig/ggjbjft/nintendo_64_emulator_mac_catalina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369933/normal_5ffb4a0ca2a99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_5fd62966610a3.pdfIn PDF document text
    • http://top-odejda.com/mewuvikukefa7kyaz.pdfIn PDF document text
    • http://duplicwcnj.space/vunosibufofuniwogeziduq02mf.pdfIn PDF document text
    • http://lastmarkt.ru/dell_s2415hb_reviewsd6mt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_6057cb43c7f3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_5fdbd06ac493f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pesixogid.rf.gd/full_body_workout_routine_for_runners.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/industrialization_worksheets_free.pdfIn PDF document text
    • http://zalaxorenisev.epizy.com/android_emulator_for_pc_wiki.pdfIn PDF document text
    • http://tusezetadid.epizy.com/melogibokobekuji.pdfIn PDF document text
    • http://jatuxijor.epizy.com/dawomivadesagixobetepil.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/what_is_the_best_windows_operating_system_for_gaming.pdfIn PDF document text
    • http://xafofeb.epizy.com/best_online_investment_app_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/bizuninere.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_off0001600b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1600B 5392 bytes
SHA-256: f44f04a8d808e11b68ce1d018a1e54ad8657155ff540767c616c7c3a99d77e94
font_01_sfnt_off0001727b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1727B 14804 bytes
SHA-256: a66084b96cbb9a986d31f71e5cae744268648f19411918c7d8e2b40c7859a2c6

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