Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fb632b93ce0e35…

MALICIOUS

PDF

70.4 KB Created: 2021-03-19 18:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1a4c2eac9d87295fbc08285d4a7b2ee3 SHA-1: f003b76671ccf7e027cccc04fa0c3e4e4f56b624 SHA-256: c3fb632b93ce0e35a6b26ec0155702a8bec630b1d4126c8ab0dc130051039d36
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many of which are hosted on disposable domains or use UTM parameters, suggesting a phishing or link-farming operation. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically points to a link farm strategy, and the ML_NYX_PDF_MALICIOUS score of 0.999752 strongly supports its classification as malicious.

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 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.
  • 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://leonvi.ru/strik?utm_term=plantronics+voyager+legend+uc+pairing+mode PDF link annotation
    • https://cdn.sqhk.co/jakufomego/JjbK97U/dragon_ball_super_battle_of_gods_arc.pdfIn PDF document text
    • http://demask.space/53380094474c87kq.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/f53HheG/royal_offense_game_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/LgefibM/nekuxolenibetalale.pdfIn PDF document text
    • https://palajuwasodix.weebly.com/uploads/1/3/2/8/132815908/venekizovurewes.pdfIn PDF document text
    • http://tesar-krd.ru/40977865726418n1.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/ifowic4/bloomsbury_farm_tickets.pdfIn PDF document text
    • http://jotijitod.66ghz.com/ayyappa_songs_tamil_2017.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/mujog.pdfIn PDF document text
    • http://salebox.shop/paxofosamafopamaxozenir6ywt1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xidozakeza.rf.gd/can_you_take_a_permit_test_online_in_ky.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/639da025-3580-4fc9-baf2-cc6894815307/sig_p229_e29r-9-bss.pdfIn PDF document text
    • http://dosututoseres.rf.gd/a_lesson_before_dying_full_movie_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5b3b7c-b096-48ec-a25b-d28493ea7338/mevabufabipoluzus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/670bcf94-bff0-4c42-a0ef-5a74873c0052/sas_advanced_certification_prep_guide_download.pdfIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_3a3dc463e00d420ca736280821b6c775.pdf?index=trueIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_9fbc2c664edd44dda8a48ee73c29be20.pdf?index=trueIn PDF document text
    • https://107a3552-ed21-4f5d-95e3-510b6eae4444.filesusr.com/ugd/21bbef_a28119b185794464b939382d512fe074.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/be931a0a-6349-4215-864a-c9f3d78697a4/tidixexixipirimuziz.pdfIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_50e50de22b8e490f9ee771bf5d7f92b4.pdf?index=trueIn 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_off0000d429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD429 5556 bytes
SHA-256: f086277aae2a5a803ff06f768da3fd5d759a552455d3a8d8bd053d46a116a24b
font_01_sfnt_off0000e709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE709 10884 bytes
SHA-256: 5b14490b1ad6d0bef8d636dfb9270f8210cf66520235de8b3c41a82f178c39d8

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