Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09f2b192abfa988…

MALICIOUS

PDF

68.5 KB Created: 2021-03-17 05:15:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2416928ac7b120ba2e4155e78dfa2b6b SHA-1: bf458b01dcdbfce7e6e9ea5eba0764d7de17114e SHA-256: c09f2b192abfa9889135828645274b10b9cac69b6edb863e74aa89807d9d76f2
224 Risk Score

Malware Insights

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

This PDF file contains multiple embedded URLs, with at least one identified as a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier output strongly indicate malicious intent. The document's structure and embedded links suggest it is designed to trick users into navigating to potentially harmful websites, likely for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/123?utm_term=all+my+loving+tab+pdf In PDF document text
    • https://dexewagumaz.weebly.com/uploads/1/3/1/4/131438443/xuredaxusuletuvis.pdfIn PDF document text
    • http://eeeeeyyy.space/larotasuwedelifinidxp88c.pdfIn PDF document text
    • https://kixajunurepe.weebly.com/uploads/1/3/1/4/131406563/008cd701.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/fdcdb22.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/iaUnieH/mobile_wallet_apps_in_usa.pdfIn PDF document text
    • https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/4372294.pdfIn PDF document text
    • https://kisuwirabavaruz.weebly.com/uploads/1/3/3/9/133999170/mapiberozeme_figalalezelupa_tewijumesu_rimeramop.pdfIn PDF document text
    • https://valuzobuxile.weebly.com/uploads/1/3/2/7/132711949/kizanuleze_tidirame_lumis_jusajetuwu.pdfIn PDF document text
    • https://zidimegaga.weebly.com/uploads/1/3/0/9/130969389/9188652.pdfIn PDF document text
    • https://pigulanofalo.weebly.com/uploads/1/3/1/4/131406379/firezenetoja-batajavabofej.pdfIn PDF document text
    • http://liketime.fun/learn_robotics_onlineievs0.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/jdrxHjj/ludo_star_hack_apk_apkpure.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/xopugup/does_mazda_have_start_stop_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5b6025-be9f-42af-b4ab-bc13f0acbd6d/plant_physiology_topics_for_presentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9e30c8-eccc-446b-9825-8c6b0cbbdb85/zidaru.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/jubilate_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/how_to_draft_a_legal_opinion_south_africa.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_off0000cf67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF67 5380 bytes
SHA-256: 5d2da3fe9bd14969d9d5a5d56f8538340f00a1049394b4009403336d759357b7
font_01_sfnt_off0000e1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B5 10348 bytes
SHA-256: 99de5d6eeffd80ec4f2ef02e84d485cddd22c77c8b4abaead4423240d172ba93

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