Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a1756097b10ee8…

MALICIOUS

PDF

79.4 KB Created: 2021-03-03 15:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 28bef448e33d671739871450a1325177 SHA-1: 947485e1596ce8b466d0a3ebad15abffc8bccc34 SHA-256: 53a1756097b10ee89286fc7806e50ac92fe10db540324d3ff86cb88c7766ea97
156 Risk Score

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 0.9998

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://botokaw.ru/123?utm_term=bowflex+pr1000+home+gym+manual PDF link annotation
    • https://ropedali.weebly.com/uploads/1/3/0/9/130969406/9901954.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/hN2cfCq/14575298682.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/ifwokSW/racing_car_games_download_jio_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/ggojaBu/kakufusanop.pdfIn PDF document text
    • https://gomarevijupa.weebly.com/uploads/1/3/4/5/134585171/mizitasu.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/4euhjPL/colour_full_3d_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rogotojuseb/Ejeheia/my_dream_house_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/fiYMEic/sudoku_hard_printable_8_per_page.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/Yjcic8h/30648627678.pdfIn PDF document text
    • https://ludekomu.weebly.com/uploads/1/3/4/5/134505051/aa6a1a9b773.pdfIn PDF document text
    • https://cdn.sqhk.co/pinufizugal/ifibhie/cookie_clicker_sugar_lumps_hack_code.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/kFjjWrD/the_ultimate_hot_hatch_drag_race.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/jemazejodep/pokapulivezovawuxirivev.pdfIn PDF document text
    • http://levasufut.rf.gd/diary_of_a_wimpy_kid_book_old_school_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/dolce_gusto_mini_me_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/chicago_manual_of_style_citation_book.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_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 5640 bytes
SHA-256: 0de7ea476e67e049630a396e9deb04d6bc65a541d5adfdac16494ddf031f74d3
font_01_sfnt_off00010989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10989 12416 bytes
SHA-256: 746dac01fcec3fc31d18c602e7f3053351b7423a2dc83ec026f8f07a0fc3f522

Open this report in the interactive analyzer, or submit your own file for analysis.