Malicious PDF — malware analysis report

Static analysis result for SHA-256 4652fc1731a8e207…

MALICIOUS

PDF

81.7 KB Created: 2021-03-30 22:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 20d0bf59bf5f8125df94b0011a21107a SHA-1: d5a5bb48d1cf732b3fb9a31b8009746e93e3d5fb SHA-256: 4652fc1731a8e20790344a9b6df8da7329d0ff9e9083cd9807160ea11efbaa0e
186 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 0.9997

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/123?utm_term=gnossienne+sheet+music+free PDF link annotation
    • http://lolibixavug.22web.org/vuxexuxetuxufanebativ.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/77d997.pdfIn PDF document text
    • http://rulabalelenifop.iblogger.org/niveles_de_prevencion_de_leavell_y_clark.pdfIn PDF document text
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/tinisavavosoxuj.pdfIn PDF document text
    • https://cdn.sqhk.co/leguzufaju/igJSgeD/world_war_iii_maxthademon_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/ghfObFB/43884733601.pdfIn PDF document text
    • https://bokirises.weebly.com/uploads/1/3/1/6/131607331/c93f2b9571.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/S6Siegg/wovopapesubumedapimi.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/powuza.pdfIn PDF document text
    • https://witiwalaligizis.weebly.com/uploads/1/3/1/6/131607575/kofamem.pdfIn PDF document text
    • https://cdn.sqhk.co/notigagamu/Qhdgdiy/star_wars_galaxy_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/faxidopudome/RdeigpM/drowning_swimmers_need_crossword.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d9e0c2d-25fe-4ba3-8f0d-2539a5a8c4c5/xolojotole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ee06d4-5b4c-4fd3-ac06-81823233b382/we_the_kings_sad_song_lyrics_youtube.pdfIn PDF document text
    • http://zalaxorenisev.epizy.com/bjarne_stroustrup_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f2e6672-7b28-489d-b3f5-cc2dce178a0f/honda_outboard_motor_parts_list.pdfIn PDF document text
    • http://misagabevud.rf.gd/how_to_connect_my_denon_bluetooth.pdfIn PDF document text
    • http://rupatal.epizy.com/65903569081.pdfIn PDF document text
    • http://relipig.epizy.com/laxuvino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12471830-a331-4834-b9ab-3a31aa8ef8b8/korean_english_dictionary_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de465927-c10d-412c-a6c4-13dc16d36b5d/wujekemapajopisejadij.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_off0000fe45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE45 4912 bytes
SHA-256: 95f20fe75356884aa6320debc8cfafdc4f9ee5a0ab1da298d2478eeb8105d957
font_01_sfnt_off00010eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDA 12776 bytes
SHA-256: 0a394e67c0828c08be7f4019a95f10e4c5d165bce7e5ba4f3ad3f74e3806ba76

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