Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c433a782d20eb1…

MALICIOUS

PDF

79.0 KB Created: 2021-04-08 00:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d304aff2fc3e00c7469a7b3ef4e67c7e SHA-1: 9181784d0be2ab4afc084ae7241c0d4affb594bc SHA-256: 04c433a782d20eb1d9388d6bee6785623d52117497b5d2641b04dc0ed6e6e1bf
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 0.9996

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 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://lozipotod.ru/strik?utm_term=how+much+does+it+cost+to+spay%252Fneuter+a+rabbit PDF link annotation
    • https://kudiwugeditonaf.weebly.com/uploads/1/3/5/9/135964520/3127742.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444644/normal_5ffcb45488f99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425237/normal_6034f2e58ad1c.pdfIn PDF document text
    • http://mnclassis.org/telkom_call_answer_user_guidegx60n.pdfIn PDF document text
    • https://jeputuzomum.weebly.com/uploads/1/3/1/3/131398597/6ee42bb779e.pdfIn PDF document text
    • http://prodson.space/13765780034cgdhs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454988/normal_6027713d2a471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_605f9f9d3a896.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/sezewu/4398149623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/914b2223-5d62-44b1-90c5-f64ea295c503/85227188626.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/awareness_poster_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/play_store_app_please.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/27557282167.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/retaduxeviposemene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf30f0e-1f8e-4be8-afb7-807f06e2652a/kunimasupezawitabodago.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/skype_for_business_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a49c14-d11f-4bd9-bd83-3591f4bdcf30/how_to_install_a_oil_boiler_heating_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a76eaa4-d7ec-4fba-8637-a9213e50947e/17357913696.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/69957876211.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/metal_gear_solid_3_snake_eater_soundtrack_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/the_golden_mango_bradford.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_off0000f663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF663 5612 bytes
SHA-256: 4c4241c44a95b29c2ae946ca95bb0cd1b42c838db75939c46bfcb5d084a121c0
font_01_sfnt_off00010964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10964 10728 bytes
SHA-256: 47c8347fb71e8c570aa03810def5ed45df503fa87257330a443f9dc64a0df933