Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9579050c34c7852…

MALICIOUS

PDF

79.5 KB Created: 2021-03-16 03:21:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 496c223989dd4977008cc16d86908cd6 SHA-1: 6e5249e6040808006ac3046c3052182847e61f96 SHA-256: e9579050c34c7852cd017b2d9b0651174a3166ba873a6283294f43c1eb9e8c02
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is classified as malicious by ClamAV and an ML classifier, and it contains links to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain text related to editing VPN settings on Android phones, suggesting a phishing lure. The presence of numerous links hosted on disposable domains further supports a malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=edit+vpn+android+phone In PDF document text
    • https://nuvutujozexavu.weebly.com/uploads/1/3/4/1/134131277/89acf5133.pdfIn PDF document text
    • https://mavabebuvaxar.weebly.com/uploads/1/3/0/8/130814237/74e5f27b730e3.pdfIn PDF document text
    • https://bufuxilanu.weebly.com/uploads/1/3/4/4/134402831/8331267.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/iDhejcR/84493047540.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/54657193989.pdfIn PDF document text
    • http://sizowozoru.iblogger.org/activities_worksheets_for_nursery.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/guxederewulewufezok.pdfIn PDF document text
    • https://zigepavozaw.weebly.com/uploads/1/3/4/3/134349437/4050973.pdfIn PDF document text
    • https://nevutero.weebly.com/uploads/1/3/4/7/134716167/ec3f3d9d4141.pdfIn PDF document text
    • https://cdn.sqhk.co/badudexig/bjdac8k/learning_by_doing_3rd_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/309b6cd5-7e93-4d16-acac-ce80afa2acc7/70271528468.pdfIn PDF document text
    • http://ximuruguj.epizy.com/boundaries_dr_henry_cloud.pdfIn PDF document text
    • http://boxijekew.atwebpages.com/76060094117.pdfIn PDF document text
    • http://wavoxobugoron.epizy.com/sukunupogitovubexum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bea4391-6bd0-4877-b7e3-589d655ffc82/jezonipadazezagugusawexe.pdfIn PDF document text
    • http://jevoneloz.epizy.com/set_builder_notation_worksheet_with_answers.pdfIn PDF document text
    • http://sujuletabekomus.rf.gd/reading_actual_test_ielts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c15cf93-3f55-4604-9303-c57d5a6deb8b/71920604366.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B7 4856 bytes
SHA-256: 2f771dee06cca51ea7570b8c86e3401f36a26f072f9e3916b1376198bd124baa
font_01_sfnt_off00010939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10939 11308 bytes
SHA-256: 2c24e762dfaf7acfd9b8c438fb3cd692fa7103901a3dc92ec29e2826cde8b4da

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