Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c38a8339274e7e9…

MALICIOUS

PDF

78.2 KB Created: 2021-02-26 02:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 25e266e974042a0ab29b76332ca860d1 SHA-1: 989f1545e6fc918896b0ac13bdbc063c0bb10c73 SHA-256: 9c38a8339274e7e97813cc5ea98c3dedc533b948b3be437a2161b95578945283
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

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://druttle.ru/award?keyword=how+to+build+my+own+app+for+free PDF link annotation
    • http://jasubizajimalep.iblogger.org/pojade.pdfIn PDF document text
    • https://nezubarenegutel.weebly.com/uploads/1/3/0/7/130776328/sinukodinivopebanuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/tilomulobet/RhYtmhb/1215042793.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/koxonut.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/hchaFgi/smoke_detector_beeps_once.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/guxup-puriro-nosorumoxakokop-zemusove.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/Q1hdjg3/carpet_cleaning_solution_menards.pdfIn PDF document text
    • https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/wajukemudenalil_livid_boralewol.pdfIn PDF document text
    • https://cdn.sqhk.co/wofamofupu/5zYahb8/feisty_greek_norwood_menu.pdfIn PDF document text
    • https://mikakegurotitu.weebly.com/uploads/1/3/4/3/134309030/nagapufaw.pdfIn PDF document text
    • http://wowezixuxaxu.22web.org/giant_realms_battle_arena_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lomidivu.rf.gd/6.5_grendel_reloading_manual.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/divera.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/delonghi_livenza_convection_oven_with_double_surround_cooking.pdfIn PDF document text
    • http://xovipofeguz.epizy.com/gagonavikiwuberenofo.pdfIn PDF document text
    • http://goxabepod.rf.gd/wuvataligilebo.pdfIn PDF document text
    • http://xedovafimolodem.epizy.com/spider_man_2099_comics.pdfIn PDF document text
    • http://sonapap.rf.gd/mitolexom.pdfIn PDF document text
    • http://sotaturorud.epizy.com/4_kinds_of_sentences_worksheet.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_off0000f5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F9 5304 bytes
SHA-256: aa47691c03b512a3a3ffe2d6f0069c1f2c6510688cb953264aa86293430020c1
font_01_sfnt_off000107fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FC 10272 bytes
SHA-256: f67cecbc026c32b165ba1e05410ed18980761abe12f2cf2bceca13f114e28a40

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