Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f30697fa77b4b1…

MALICIOUS

PDF

75.6 KB Created: 2021-03-02 19:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 27266be466df24af005beb2371d2db92 SHA-1: 5925cf02fad37f3b2727ff9abe7f6ce8022e3d36 SHA-256: 65f30697fa77b4b14efd3283de347c45c07f5fa9dca8df3e459f8ee5ec8610c6
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://dugedepap.ru/123?utm_term=vince+gironda+workout+routine+pdf PDF link annotation
    • https://cdn.sqhk.co/rorexamuviz/9OsORih/water_slide_rentals_logan_utah.pdfIn PDF document text
    • https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/6782022.pdfIn PDF document text
    • https://cdn.sqhk.co/tojofelekob/ZxiawqG/rinedefikara.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/sigugelene-vilin.pdfIn PDF document text
    • https://cdn.sqhk.co/joxonorapa/umhiogg/tubemate_apk_2020_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/igYU0y6/gevidenizozeturitujab.pdfIn PDF document text
    • http://mazanatur.space/wawagisitolif1ak0m.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/gjOh3hm/my_talking_ghost_2_game_download.pdfIn PDF document text
    • http://top-agent.ru/71707193347w0t6j.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/eCtCged/49490075250.pdfIn PDF document text
    • https://luzusuzure.weebly.com/uploads/1/3/0/7/130775685/f451428952226a3.pdfIn PDF document text
    • http://segwaywheelchair.ru/spanish_clep_test_study_guidexxysi.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/lulelepese/archery_games_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/23282275146.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/advanced_dungeons_and_dragons_dragonlance_adventures.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/kanel.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/how_to_replace_gas_stove_igniter.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/82039442990.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_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 5232 bytes
SHA-256: 3a7e40bf0e050acdbadaec34b13c4757c4d49ec6ce95ecf51334bc1be05fad3c
font_01_sfnt_off0000fd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD02 10736 bytes
SHA-256: a2724d97673df459fa149a3af02a8d5073dcdebe30a4e8e59da03eaab6582ba6

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