Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1eb2634ad48ce49…

MALICIOUS

PDF

85.6 KB Created: 2021-03-24 16:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 889b2d387fb013c47a4be2f15887c19e SHA-1: 6b614f947f1c0b0839b7cdd6cdb595157096b3cc SHA-256: b1eb2634ad48ce49e9224c5ebceb13b80d42bd098954deac2d3b4f936ade6b44
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, one of which is `https://jottigo.ru/strik?utm_term=charter+remote+setup+button`, suggests a phishing or SEO spam campaign. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://jottigo.ru/strik?utm_term=charter+remote+setup+button PDF link annotation
    • http://usersonlineguardingsettings.site/ice_cream_cone_making_machine_manufacturers_in_hyderabadia3yr.pdfIn PDF document text
    • https://rawavofim.weebly.com/uploads/1/3/1/4/131452817/8008375.pdfIn PDF document text
    • http://cartest.pro/newutibogerijih8b.pdfIn PDF document text
    • http://autobaff.xyz/how_to_merge_tables_in_google_docs_on_macoxu4v.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/jcRxxhf/48951208837.pdfIn PDF document text
    • http://podipotekoi.ru/man_of_the_house_gamegqa52.pdfIn PDF document text
    • https://vonosupaxeme.weebly.com/uploads/1/3/0/7/130740497/gukakejusiloju-pagogavedug-rolira.pdfIn PDF document text
    • https://kesozelakix.weebly.com/uploads/1/3/5/3/135300748/rurufurere.pdfIn PDF document text
    • http://mebelintera.ru/office_365_two_factor_authentication_instructions925xe.pdfIn PDF document text
    • https://posolefuriw.weebly.com/uploads/1/3/4/3/134374222/pamawogujuxoku.pdfIn PDF document text
    • http://fb-ig-copyright.com/vumoxegurimizo90s9p.pdfIn PDF document text
    • http://everydayy.fun/1050939332358gha.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/ba250fba55c.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/jdjeUjg/7707541363.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/zozofufulolig/audiovision_for_video_makers_apk_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/husqvarna_rz46i_drive_belt_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/bigesotuvubezirirukunog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3939754-bd12-4394-8415-90593afb3f0e/33731193670.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/international_business_articles_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd77e87-2e46-43c7-9b9e-7d23f8e9168b/tusexujapop.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/3402121493.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_off00011303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11303 5072 bytes
SHA-256: e96d2e83bb5975bb033c38adf5b5da9a94129255542539ccfda9a7f46b58363a
font_01_sfnt_off00012408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12408 10844 bytes
SHA-256: a3c4c930d4ef3ac98dde18b66ad7a9e77a865c88b40af133b4aecff5e07c3b76

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