Malicious PDF — malware analysis report

Static analysis result for SHA-256 425b0b0cf9bbf4db…

MALICIOUS

PDF

83.3 KB Created: 2021-05-18 02:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 67e333bd71cf5fd6835f032d29da1af2 SHA-1: 0a1c7577f46323d789a25088a83f45c22ce9d66c SHA-256: 425b0b0cf9bbf4dbfec602155a4ec9f48b8fcabdb7b7a3232bed94217753bce3
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to distribute malicious content. The embedded URL `https://baarspo.ru/strik?utm_term=descargar+juegos+de+ps3+pkg+por+mega` is likely the primary distribution point for a second-stage payload. ClamAV detection as `Pdf.Phishing.Trojan` further supports its malicious nature.

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://baarspo.ru/strik?utm_term=descargar+juegos+de+ps3+pkg+por+mega PDF link annotation
    • https://pukaxixuzex.weebly.com/uploads/1/3/4/4/134492253/2816789.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/tikagagezivetamolid.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/04f8739d-0da4-47c2-8727-e205c15374fc/4626476499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ffb5b2e-3cf9-4e23-b478-d8b513db8f1a/how_to_adjust_temperature_on_hotpoint_freezer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a296597-ab27-49dd-9136-316a31f982ee/download_driver_audio_hp_pavilion_dv5000_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4015b594-d409-4729-9072-42f05efacf59/20471810261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608f674e-4356-4223-bc7b-31e43220d711/hp_deskjet_3050a_j611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f41673cb-c739-4cd0-aab9-abd8483952f4/california_ab_60_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/glasses_prescription_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad1f3b7-28bd-4188-930e-4859fa503212/korean_phrases_with_english_translation_and_pronunciation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b4f5deb-e963-45c2-be51-d392ff590337/research_methods_in_psychology_2nd_american_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caaa4291-73c1-4784-88c8-224e344c9596/zuleselikirenokesozetu.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/29799140452.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/50021582893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e02f412-89f7-4a20-b3ff-81c81c124942/xadaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94120e7c-6539-4f8a-85c3-6dc7986b750b/usaa_survivor_relations.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/princeton_review_gre_premium_prep_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/bezavozo.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/ardaas_karaan_movie_video_song.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_off000103bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BB 5664 bytes
SHA-256: cf67e2b051d2c20b598acc531315e9d397b0eafb608fab7f3499814f175795be
font_01_sfnt_off000116ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FF 12088 bytes
SHA-256: 3902b5a269e362b753fbae5a5a439d544d239dba1651644824c1f8fa9cfc0838

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