Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c047d58649e7c7…

MALICIOUS

PDF

76.1 KB Created: 2021-01-17 22:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 29a5bbb9ab3944cb8550d58309594014 SHA-1: d2d1750675b2c5c47adbfccf92f68acbf9d18f12 SHA-256: c5c047d58649e7c7cdc1dd8566e4f1483b3229d4bad453fad57d41785ffa2b08
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous external URIs, including one pointing to 'traffking.ru', suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to deliver a phishing or malware payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=money+flying+away+clipart PDF link annotation
    • https://site-1203080.mozfiles.com/files/1203080/margherita_turkey_pepperoni_nutrition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5fde3b1bf3dea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5fb281738ca28.pdfIn PDF document text
    • https://site-1195792.mozfiles.com/files/1195792/download_game_run_fish_run_2_mod_apk.pdfIn PDF document text
    • https://site-1168172.mozfiles.com/files/1168172/xugoweburubodegix.pdfIn PDF document text
    • https://site-1168308.mozfiles.com/files/1168308/jiwitadizelamexiberuzezi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_5fc561c71df55.pdfIn PDF document text
    • https://site-1197512.mozfiles.com/files/1197512/18885248795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f917a91d8b13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pevurevakube.rf.gd/psx_emulator_android_roms.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/beginning_css_cascading_style_sheets_for_web_design.pdfIn PDF document text
    • http://wepinipinalojud.epizy.com/ari_lasso_lagu.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/57680059536.pdfIn PDF document text
    • http://bofisul.rf.gd/6825658741.pdfIn PDF document text
    • http://zegudonokor.epizy.com/google_chrome_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/checks_and_balances_worksheet_8th_grade.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_off0000eb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB54 5204 bytes
SHA-256: 3eab1b6ff6c78d81b7b18fd1b961b5c560f3d806f1a95a511913f160bf9313e7
font_01_sfnt_off0000fd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD48 11108 bytes
SHA-256: 7e8cc3f7c8030053ca8e6c610ce0b87d0abef6cb36a46f5cf00a811cf14fcb02

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