Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee9311d09f4d2cb…

MALICIOUS

PDF

78.9 KB Created: 2021-03-01 21:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 491727648f9e97dc15395878987f73b3 SHA-1: 2f6f5e7a7124edba62eaa371cf9ac10608c402c4 SHA-256: fee9311d09f4d2cb490177ccaaf4f0be72bb02b278d87b6db6304791cc103400
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though partially obfuscated, suggests a lure related to 'Romeo and Juliet act 5 questions and answers quizlet', indicating a phishing or malware distribution attempt. The presence of external URIs and link farm characteristics further supports a malicious intent to redirect users to potentially harmful sites.

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://zajinet.ru/strik?utm_term=romeo+and+juliet+act+5+questions+and+answers+quizlet PDF link annotation
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/likememepidi.pdfIn PDF document text
    • http://idealica-italiauficiale.website/big_data_analytics_tools_free_downloadnv0cx.pdfIn PDF document text
    • http://zinuvudoliku.iblogger.org/46918592352.pdfIn PDF document text
    • http://daating19.site/sovameminoxujejoneqgvdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_603936db149b9.pdfIn PDF document text
    • http://net-klientov.ru/what_jobs_can_i_get_with_a_business_communications_degreexy3lk.pdfIn PDF document text
    • http://jokidinavefo.22web.org/analise_sintatica_de_frases.pdfIn PDF document text
    • https://xanikijopido.weebly.com/uploads/1/3/4/7/134738407/5351846.pdfIn PDF document text
    • https://dozogifelezu.weebly.com/uploads/1/3/4/3/134313369/2812247.pdfIn PDF document text
    • https://fenanenu.weebly.com/uploads/1/3/4/2/134265689/253d38c53035c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://femubavavozemag.epizy.com/govesilakiduwan.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/zadexuforepuzaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/sudoku_easy_with_answer.pdfIn PDF document text
    • http://sejabozewilobog.epizy.com/despicable_me_1_in_tamil.pdfIn PDF document text
    • http://nojekakanafigi.rf.gd/business_information_systems_job_vacancy.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/xagon.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/manualidades_comprar_carton_pluma.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_off0000f7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C5 5560 bytes
SHA-256: 081b7cd85ef55a1dd046b6f46a046529aeacbb06f5e6c3e8bb8ece4765882071
font_01_sfnt_off00010ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB9 10436 bytes
SHA-256: a78dd9ceb63526ff09ae110e03e3ef642b01545cbc6fbb78b462b43038d565e0

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