Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3294680a9190ff5…

MALICIOUS

PDF

75.6 KB Created: 2021-02-20 22:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1b2fbf68f4bcfe198a90fbb707536b09 SHA-1: c6d4420823d90474465cee2a8071b366f5e2ebea SHA-256: f3294680a9190ff5d78906820a58617e5d9e0cc559911e95983041ccefa86499
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule indicating a mass of external links. The ML classifier and ClamAV also identified it as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to potentially harmful content or participate in link farming 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 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://leonvi.ru/123?utm_term=what+child+is+this+greensleeves+violin PDF link annotation
    • http://usersonlineguardingsettings.site/zolorafanunupij4wia.pdfIn PDF document text
    • http://jenirafona.22web.org/54552656057.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/babowovif_zedurujavone.pdfIn PDF document text
    • http://avit0.pro/nutirilowasabubakazuvivhxb1r.pdfIn PDF document text
    • http://weareanonymous.org/35973398692y3k9v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/wovugi/jasinirugarodado.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/sepozuvokisumaxegebune.pdfIn PDF document text
    • http://kujazidi.epizy.com/statistics_hypothesis_testing_questions_and_answers.pdfIn PDF document text
    • http://familule.epizy.com/j_d_u_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/queen_size_sheets_measurements_in_cm.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/inductive_voltage_transformer_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/kerewafa.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/libro_el_cerebro.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/easy_boogie_woogie_piano_free_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/16995638010.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/26673500516.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/7015079056.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/blast_nt_database.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_off0000cd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD73 5272 bytes
SHA-256: 877fb9702043f89882b35e24c877af67f00d35efc67aaecaa69c2f8f2ae966b0
font_01_sfnt_off0000df6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6C 11364 bytes
SHA-256: 24f297ec9c9662ad9b729d23b6684652f6a5c7c08e73519955d42ef270ca14b0
font_02_sfnt_off00010651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10651 7912 bytes
SHA-256: 5c62c842fc53a8752803cba81471a442a9b89cd115a0016604612b71e02216b7

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