Malicious PDF — malware analysis report

Static analysis result for SHA-256 085faaa72741c715…

MALICIOUS

PDF

76.7 KB Created: 2021-02-03 00:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 48196bd9fa2109ebbc5f08654a4d45f3 SHA-1: 440428ec26574d6c5d7930d85919d37ab4291ee6 SHA-256: 085faaa72741c715aef4b1320e97a4d72df4074abf031417d6937d18cae3c87e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one identified as a link farm on disposable hosting, suggesting a phishing or scam attempt. The primary goal appears to be directing users to external websites, likely to download further malware or engage in fraudulent activities.

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/wb?keyword=demographic%20information%20addendum%20instructions PDF link annotation
    • https://cdn.sqhk.co/pozuwifofub/jhifhcn/clownfish_voice_changer_xbox_app.pdfIn PDF document text
    • http://yachts-4-sale.com/klaster_kambal_katinig_worksheetktmuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_60195819884ca.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/o3ibphd/petrol_star_picket_driver_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/fujonexa/mjghgbL/45049986518.pdfIn PDF document text
    • http://physcoo.com/simbolos_de_proteccion_y_su_significadobaurz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490722/normal_5ff508982a6c0.pdfIn PDF document text
    • http://xiselegudiwip.iblogger.org/74302746072.pdfIn PDF document text
    • http://reduslim-ordina.site/zynn_download_link4bhs8.pdfIn PDF document text
    • http://pc-remont.website/43612213630l4yx6.pdfIn PDF document text
    • http://trastqort.online/estruturas_de_ao_pfeillgf5g.pdfIn PDF document text
    • http://kismykeitio.best/coefficient_management_des_entreprises_bts_nrc4hqkc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dinopug.epizy.com/fccla_planning_process_template.pdfIn PDF document text
    • http://xulelaperimiku.epizy.com/11701513630.pdfIn PDF document text
    • http://nakepusigazu.epizy.com/mitatawez.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/5829744545.pdfIn PDF document text
    • http://pabizazixivak.epizy.com/bible_study_guide_genesis_23.pdfIn PDF document text
    • http://dozonox.epizy.com/adobe_photoshop_gratis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE169 5416 bytes
SHA-256: c468b8aac6069c01233f98b783bb21705cf4d665b1bc62d54f2adb03812d6684
font_01_sfnt_off0000f3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 10452 bytes
SHA-256: 59100a9d765adc501695538673ef2321ab00213a1e12483a231f5348e42f5dae
font_02_sfnt_off00011736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11736 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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