Malicious PDF — malware analysis report

Static analysis result for SHA-256 9390aae59ba07fb7…

MALICIOUS

PDF

74.4 KB Created: 2021-06-02 15:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6b5a6de2a52c73d4a2fc19771d57dc81 SHA-1: 5c58e4d8e79a06631b1b8d024eef3babf3ab4c8c SHA-256: 9390aae59ba07fb7ca943cca7bc9d1cc2906010eb868d7df51456fdc160ef590
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm designed to redirect users to external websites. The embedded URLs and the PDF's structure suggest an attempt to generate traffic or potentially lead users to malicious content. While no scripts were extracted, the PDF's nature and the presence of numerous external links indicate a malicious intent, likely related to phishing or ad fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://irlanc.ru/pbw?utm_term=bihar+stet+result+2020+physical+education PDF link annotation
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/d439c.pdfIn PDF document text
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/dezutis.pdfIn PDF document text
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/nogubotofute-pivejapovavo-nikulovip.pdfIn PDF document text
    • https://nuresoxak.weebly.com/uploads/1/3/1/3/131380504/7927252.pdfIn PDF document text
    • https://xatomurukazaj.weebly.com/uploads/1/3/4/3/134378662/8841204.pdfIn PDF document text
    • https://sunigudeme.weebly.com/uploads/1/3/4/5/134503290/4286917.pdfIn PDF document text
    • https://niburisugop.weebly.com/uploads/1/3/6/0/136082965/mivolet.pdfIn PDF document text
    • https://gadetuzajuvi.weebly.com/uploads/1/3/4/8/134850054/9896586.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pojaweku.pbworks.com/w/file/fetch/144452703/kabir_singh_movie_download_pagalworld_hd_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e46cc22c-04c7-4835-a8f5-939cd9431cb8/nofesutozozagiwer.pdfIn PDF document text
    • http://nikekuva.pbworks.com/f/how_to_setup_a_sharp_alarm_clock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4dd31ad-9ccf-4313-b1d6-c0c2e07c3026/mupofelezi.pdfIn PDF document text
    • http://wurutaw.pbworks.com/w/file/fetch/144507684/wideti.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144419790/satesikivilelabusaliru.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144455181/what_does_unseen_mean_in_spanish.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/farewell_speech_for_students_in_assamese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea21a002-4439-4db5-ac58-786354ab6b5f/7471762177.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/w/file/fetch/144495783/marriage_certificate_form_download_rajasthan.pdfIn PDF document text
    • http://sujagajo.pbworks.com/w/file/fetch/144486408/tamelizupemuzokemurokijes.pdfIn PDF document text
    • http://ruwomodanom.pbworks.com/f/464200104.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/98380094218.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/f/88870244674.pdfIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144489333/how_many_atoms_are_in_1.5_moles_of_water_h2o.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/f/4319535826.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_off0000e4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D6 5584 bytes
SHA-256: 884456d65e6f22e83c0c639b30bb44302bfd62c08cf1ce1eec826c397fb74925
font_01_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 10680 bytes
SHA-256: 097d535179f9502ff80061a843784bd092d24f81883b93bd3a8a5a9261ab5dd2