Malicious PDF — malware analysis report

Static analysis result for SHA-256 20367f5b7109be4b…

MALICIOUS

PDF

83.5 KB Created: 2021-02-28 12:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7329f41d57895b37dbfdf1adb825db3a SHA-1: a2e6133f12f045d507b93ee1b8a141d54bf7ac82 SHA-256: 20367f5b7109be4ba0e759a31d614d1a351f3bdfff2c99fac658c34861fc6226
196 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a password-protected archive lure, indicating it's designed to trick users into downloading a payload. It also includes a large number of external links, with one pointing to a suspicious URL that appears to be part of a phishing or malware distribution scheme. The ML classifier strongly flagged this PDF as malicious, supporting the phishing and trojan detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/strik?utm_term=farming+simulator+15+pc+download+highly+compressed PDF link annotation
    • https://bivolureru.weebly.com/uploads/1/3/4/5/134583024/budaf-dakepefaji-lozore-pegufuwavinel.pdfIn PDF document text
    • http://jumpfs.space/metagokemakajewoxokupkira.pdfIn PDF document text
    • http://itnegozio.info/nanajimor46idd.pdfIn PDF document text
    • https://kogozodibivuf.weebly.com/uploads/1/3/6/0/136094397/fofulig.pdfIn PDF document text
    • http://creampiepow.club/buffalo_weather_report_wednesday6d2o5.pdfIn PDF document text
    • http://prodson.space/city_jogger_double_stroller_travel_systemlqa82.pdfIn PDF document text
    • https://lomapasaxanigef.weebly.com/uploads/1/3/1/1/131164081/771485.pdfIn PDF document text
    • http://verifybadgesbusiness.com/73921953874zszmw.pdfIn PDF document text
    • http://alphabitx.com/378915606911i1tk.pdfIn PDF document text
    • http://lakshmi-store.ru/best_place_to_farm_seekers_warframe08qv3.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/xukirizugukugi/lujagimadaxidotowik.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/theories_of_calculus_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/buscar_mi_android_google.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/bambukat_movie_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/elster_a1700_user_guide.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/sap_hana_free_online_training.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/44887295872.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/27793460847.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/what_is_a_word_for_good_work_ethic.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_off0000fb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB66 5812 bytes
SHA-256: c0cadd52d2c60965369e76bf48cd8c7add4f051765d354000bd4b3d390e14165
font_01_sfnt_off00010f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1F 15164 bytes
SHA-256: aac3b50de778de1324362367637805c579e364a81a9b81ac68a6193d501e7622

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