Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eee50311ff554c1…

MALICIOUS

PDF

75.1 KB Created: 2021-03-01 19:15:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 58312a50d821feefeb6dae99de83e565 SHA-1: 4daac61a1ed9b9161b8eaccb2f7842367b0857b2 SHA-256: 1eee50311ff554c124c236407db8c95438e3b29bf776077ff56b405fb0b6293e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

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://xezojetit.ru/strik?utm_term=modern+electronic+communication+gary+miller+pdf PDF link annotation
    • http://silorab.22web.org/21585779666.pdfIn PDF document text
    • http://gidujoluj.mypressonline.com/why_is_my_samsung_refrigerator_water_dispenser_not_working.pdfIn PDF document text
    • http://xozowilozoga.mywebcommunity.org/97471116925.pdfIn PDF document text
    • http://gizaripe.iblogger.org/rural_development_ap_questions_and_answers.pdfIn PDF document text
    • https://tonawonigavima.weebly.com/uploads/1/3/5/3/135345065/8266637.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/whats_a_good_self_tanner_for_pale_skin.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/46948336203.pdfIn PDF document text
    • http://wititabeg.22web.org/lemek.pdfIn PDF document text
    • http://bofajazikevag.22web.org/babbel_spanish_app.pdfIn PDF document text
    • http://gedawirij.66ghz.com/faxukazixevufaxekaxenewut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://koriwiginajefet.epizy.com/lipekeluwu.pdfIn PDF document text
    • http://taxonan.rf.gd/68361943760.pdfIn PDF document text
    • http://nebopujewewap.rf.gd/chinese_auricular_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/duregukinibipelozapabokaw.pdfIn PDF document text
    • http://nizulodezif.rf.gd/42178778041.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_off0000dab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB7 5284 bytes
SHA-256: c70efc17def5924836a3acbb1750742cd75b19441131e01d07a90f03a4d80709
font_01_sfnt_off0000eca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA1 10892 bytes
SHA-256: 462d1ef112ed029bba8b5aa41d43aefc95d6750f1bd8f06669f38c8ef62a5612
font_02_sfnt_off0001113b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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