Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b63f4182421b4d…

MALICIOUS

PDF

76.8 KB Created: 2021-03-11 19:23:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 438fac82893b60606e187b77ece71e52 SHA-1: 2505bd0c9a5eca54649efcc8ea5861a464def372 SHA-256: 20b63f4182421b4df85b4f8bdd0d1779dabba67984871fbe1733227e6fa46bda
156 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. 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-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.
  • 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://leonvi.ru/strik?utm_term=sarah+plain+and+tall+chapter+5+summary PDF link annotation
    • https://cdn.sqhk.co/lazujanaziri/l3hchff/68969311379.pdfIn PDF document text
    • https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/f1d1cb6d5de3fdd.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/jhirBgd/free_games_download_full_version_time_management.pdfIn PDF document text
    • https://cdn.sqhk.co/puzokopu/xXkgfja/varobinaxaxelize.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/UaggQ3c/80260778864.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/VF0Xigj/cake_decorating_with_candy_bars.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/malepolelofogep.pdfIn PDF document text
    • https://cdn.sqhk.co/fupetabuwuf/ig2gdhh/swan_retro_griddle_pan.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/gcjiche/85340987985.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/EiigdSo/lost_lands_5_hidden_object_game_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/fnchdif/80256912908.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/babuxufarizuxur/fudorosijipesozonugegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4eb856-449a-4b37-ad73-672441e78527/xobumorodonawazov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035b2da3-8f40-4b74-add9-c5834dd6b63c/dotilarovek.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/alter_ego_plus_1_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e1e838-f65a-461d-a1aa-643d920c2cb5/wital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df27da3-f12d-4e65-b61f-c9dd635480b9/dawizivokijuxajuxit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae3a30c-b34b-45b2-8122-989fd7c92b4d/vajozujexelusanimixuvan.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/lenibub.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/kendo_grid_group_footer_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/kolonumimonadike.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/lififubexura.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_off0000edbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 5640 bytes
SHA-256: 5a19d8e2bc564f849d6c6151ab0761847ea36058932c4ac16d41ddeef3c89e40
font_01_sfnt_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 10976 bytes
SHA-256: 8ab9bd1632eaa2aab11f0fbd92349d2953e57360ca3a23ac9e52eaee9a1afeec

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