Malicious PDF — malware analysis report

Static analysis result for SHA-256 20bf80b59dc68617…

MALICIOUS

PDF

80.8 KB Created: 2020-12-13 23:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 018dd54d36153609414e63f9a864767b SHA-1: 9d14a38d3b534ad2eecf71c847ddaca8876c830f SHA-256: 20bf80b59dc6861703a232bcc981b66eec10780bfaedd7a08b3f2b8d206ecb50
164 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 0.9994

Heuristics 6

  • 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.
  • 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://traffnew.ru/strik?utm_term=hero+hunters+mod+apk+download+android+1 PDF link annotation
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/319c4bd274986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_5fb282c8c022e.pdfIn PDF document text
    • https://nugekowu.weebly.com/uploads/1/3/4/5/134587082/9817178.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f88cd9a9324d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393755/normal_5f9a0a2f20f11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423471/normal_5fa057b4ac2fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/libowebujakux/grammaticality_judgement_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/97371427900.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/important_events_in_indian_history_from_1857_to_1947.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/descargar_spacedesk_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/92194158762.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/football_games_2018_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/central_park_map_new_york.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03D 5252 bytes
SHA-256: 39032879339d2c33b9b1d11f386c52f90f1c514b32e9238f7bd2c147cef41e8d
font_01_sfnt_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 1932 bytes
SHA-256: 79146b382a30d57b86cd31aee382fdde8e94a7721889692ffed962feefcb06eb
font_02_sfnt_off0000eb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB32 11196 bytes
SHA-256: 1127b17d05405b993a627dbd684071b87ab3e907a7ed53dcfe51498f30daa264
font_03_sfnt_off00011192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11192 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d
font_04_sfnt_off00012693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12693 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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