Malicious PDF — malware analysis report

Static analysis result for SHA-256 101bb5b9b6c91fcf…

MALICIOUS

PDF

128.0 KB Created: 2021-05-01 10:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 19471f27e4bf06f18682c2ddad4f4ebd SHA-1: a2c67c1c1ed8517a8fea3f134c2af1b9ce16f70b SHA-256: 101bb5b9b6c91fcf96c72b6ca70a1d4db076349153f5d7a6f7926b7537e79b14
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is malicious and has been flagged by a machine learning classifier and ClamAV. It includes an external URI pointing to a URL that appears to be a lure for a BIOS update, suggesting a phishing attempt. While no scripts were explicitly extracted, the PDF structure and malicious indicators point towards a phishing attack designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=asus+p7p55d-e+deluxe+bios+update PDF link annotation
    • http://pinenud.mygamesonline.org/gikowomugajipaba.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/analise_combinatoria_combinao_simples.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/2709369.pdfIn PDF document text
    • http://dosefokinuvulo.mypressonline.com/wibapidi.pdfIn PDF document text
    • http://faceit.su/que_significa_cuando_sueas_embarazoaf17l.pdfIn PDF document text
    • https://jetosopotow.weebly.com/uploads/1/3/4/0/134018613/4326274.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/3764480.pdfIn PDF document text
    • https://josozigigararu.weebly.com/uploads/1/3/2/6/132681886/pisagakurisuki.pdfIn PDF document text
    • http://gixitetopes.scienceontheweb.net/pathfinder_bestiary_2.pdfIn PDF document text
    • http://kemikavar.mypressonline.com/biostatistics_question_and_answer.pdfIn PDF document text
    • http://esclick.pro/bosch_silence_plus_50_dba_stop_beepingoyc3h.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/5458211960.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/kisimujuk/download_buku_muqaddimah_ibnu_khaldun.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/sakomuzuronimazekud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adce991c-d4dc-4bfc-ab10-0ddd1762f139/what_is_steak_tartare_taste_like.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2526f5d-050c-4207-a055-d4ef57169865/lelodugefil.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/hasbi_rabbi_jallallah_naat_audio_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9b5263-47d9-417b-8071-f058bd7c59f0/google_maps_api_free_or_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8333aaf-d623-47b7-aba1-e64e5e6ebbcf/jotul_f500_reviews.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/xutigalaxemi.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/entourage_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/14662322764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23db8e0-348c-4beb-8251-d59a45e48a26/44212670600.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_off0001b5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5FA 5292 bytes
SHA-256: 3893077fd3012bf52e0c1d450ea2a64990384d8f92b27f6b16dd8461f0628587
font_01_sfnt_off0001c81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C81F 12820 bytes
SHA-256: aeb1f9a763d3c07545378de2892484236262b430d57216897f3142cd195343ba

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