Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8eda52ba0c5fa31…

MALICIOUS

PDF

71.6 KB Created: 2021-02-23 21:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8eb610b4f5b223a257785d4dc007bc78 SHA-1: 10f3e6e4789cae35afec3de8933e9ae5c886546f SHA-256: f8eda52ba0c5fa3125004564a8c59d265fd95a71e60ca9c4c8bcbb5205222a4f
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/123?utm_term=what+is+bs+8888 PDF link annotation
    • http://topplafond.xyz/eurydice_bologna_process_implementation_report2dsdb.pdfIn PDF document text
    • http://znatural.space/tunivifarog3wal6.pdfIn PDF document text
    • https://lalojitewimagix.weebly.com/uploads/1/3/5/3/135304200/bexogezutebi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465003/normal_5fcb522c34d83.pdfIn PDF document text
    • https://zadidiboz.weebly.com/uploads/1/3/5/2/135295834/2790063.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/ihH6HfV/mine_survival_hack_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384144/normal_5fee7c960cc7c.pdfIn PDF document text
    • http://jushq.club/718766764015wzmx.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/Xhc8hEE/chauvet_colordash_accent_quad_led_rgba_black.pdfIn PDF document text
    • https://giberala.weebly.com/uploads/1/3/5/3/135306284/7559238.pdfIn PDF document text
    • https://jerusofiv.weebly.com/uploads/1/3/0/9/130969981/guzatu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_5fd86be24ec80.pdfIn PDF document text
    • https://fuzaterolipi.weebly.com/uploads/1/3/1/4/131438829/visawewasepat.pdfIn PDF document text
    • https://zitakutuseg.weebly.com/uploads/1/3/5/9/135994262/bujorewiteb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496571/normal_5fcbee8423bac.pdfIn PDF document text
    • https://xusofudubivo.weebly.com/uploads/1/3/0/7/130775679/67354e.pdfIn PDF document text
    • https://xokefinodoju.weebly.com/uploads/1/3/5/3/135316617/3350017.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/giMhcCT/star_trek_fleet_command_missions_greyed_out.pdfIn PDF document text
    • http://itwow.info/puwirevusolilogexopi7so7x.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/mokamoba/13237004825.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_off0000dc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 4992 bytes
SHA-256: b32b5c9cf528aad3a2fcfd00ffe05f3e880b709f4b02617adfc55c6878cb7f5c
font_01_sfnt_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 10736 bytes
SHA-256: 9fb99c7073d0b2c89fd69246d102002170a5969fa728ecff7e3a0da075d4ee81

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