Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09aefe03b15b74f…

MALICIOUS

PDF

75.4 KB Created: 2021-06-07 10:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 639f403327d8712a0ce219db497718f9 SHA-1: 20f9b520e8f8be6ea36c143fc9ecbb2d35ebef41 SHA-256: f09aefe03b15b74fad51cbcc408f1b9755d1cffe0ee99a7935a105fc94ec6cf7
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely used to redirect users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • 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://archism.ru/pbw?utm_term=how+to+read+taylor+food+scale PDF link annotation
    • https://dabawide.weebly.com/uploads/1/3/7/5/137511183/varigabaduxikowogi.pdfIn PDF document text
    • https://lewixukulir.weebly.com/uploads/1/3/1/6/131606807/6c4e3.pdfIn PDF document text
    • https://dewotime.weebly.com/uploads/1/3/1/6/131606762/1224365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5fd0afcb01155.pdfIn PDF document text
    • https://ganubidorebe.weebly.com/uploads/1/3/2/7/132740923/af558ea6ac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370285/normal_605a64c08d2a9.pdfIn PDF document text
    • https://nigakanal.weebly.com/uploads/1/3/4/5/134527226/a71a39dba69b38e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_5fd77711cfb78.pdfIn PDF document text
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/3746890.pdfIn PDF document text
    • https://bategasef.weebly.com/uploads/1/3/2/7/132712490/velifefafufutu.pdfIn PDF document text
    • https://xojowikenokux.weebly.com/uploads/1/3/4/7/134706662/500754.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465006/normal_5fe5f020016b1.pdfIn PDF document text
    • https://muzekulukusutaw.weebly.com/uploads/1/3/5/2/135296419/newajozivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_6039c9010a30a.pdfIn PDF document text
    • https://gikemadisasov.weebly.com/uploads/1/3/4/6/134667176/2913386.pdfIn PDF document text
    • https://zogazakuf.weebly.com/uploads/1/3/1/6/131636678/1b55843dce1a.pdfIn PDF document text
    • https://samarobiratepiw.weebly.com/uploads/1/3/5/3/135327643/lutuzabinolaf_xatusokaxizug_soxoz.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/344db7d9-f473-4291-80f5-e5bdaa789120/kasitovamurabotekipaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac809555-324d-4d25-8f0b-df17aeccdb7f/94243060613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523ec797-968a-4c92-a414-494b2cc5660e/how_to_check_serial_number_of_dell_laptop_in_windows_10.pdfIn PDF document text
    • http://wuwazilizos.pbworks.com/f/acls_precourse_self_assessment_answers_2021_quizlet.pdfIn PDF document text
    • http://murenet.pbworks.com/f/muxudatu.pdfIn PDF document text
    • http://lokiboz.pbworks.com/w/file/fetch/144474435/dibujos_de_navidad_para_imprimir_y_colorear_de_los_reyes_magos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5337a74-d882-4f8a-bc27-5f4399026ef4/xivikew.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/f/3d_printed_toy_car_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5234d924-ff1b-42c0-a70e-a907a99c595b/diribuluge.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_off0000ea73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA73 5168 bytes
SHA-256: 375b92a8084e04e52661b5c7c0b7df7610d4657b209481f5606aa40d75f58164
font_01_sfnt_off0000fc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC31 10468 bytes
SHA-256: 6d2053ddede228009bde69fe43925b4dc0a079f4ebecdc9120f1e6c013590e72

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