Malicious PDF — malware analysis report

Static analysis result for SHA-256 16780372df9b46ee…

MALICIOUS

PDF

75.9 KB Created: 2021-03-25 07:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 49cd185a5c0afd6519d3b5875a8634fb SHA-1: 38692aa60e747fb8fcc15d531f7ab531d2395df2 SHA-256: 16780372df9b46ee70c69d530cd79f6f819f1d11af7de20e9ffcfaa1209a54ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://leonvi.ru/strik?utm_term=que+significa+presion+en+el+pecho PDF link annotation
    • http://cybety.xyz/intermolecular_force_of_attractionhjq5l.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/pijadobexufisut.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/set_theory_examples_and_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/fojoravuvu/Mhhhvco/dino_theme_park_craft_ride_dinosaur_rollercoaster_tycoon.pdfIn PDF document text
    • http://ubsvp.com/pre_marital_questionnaire3m5nm.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/weketo.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/60244766249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503390/normal_6049e31abe047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_602b9fff3d447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489846/normal_604dc330a92c1.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/boss_riot_r1100m_protection_light.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/uHxjbhc/moduv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467325/normal_602a090540c9d.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/cantonese_english_dictionary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jikelaxapexa.onlinewebshop.net/wagejedetunomufaxifodowe.pdfIn PDF document text
    • http://dibulazovila.rf.gd/97396054503.pdfIn PDF document text
    • http://rifunasi.epizy.com/nombres_de_dios_en_hebreo_con_su_significado.pdfIn PDF document text
    • http://telosizaba.onlinewebshop.net/dixapowati.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_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 5336 bytes
SHA-256: cb45e8619cd3e7fb1c6aef7da50aaf03b872b33e59cae7724568bd0d45cd04bf
font_01_sfnt_off0000fc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 11352 bytes
SHA-256: caaf3d8389d5697c2e6a01c049db43ccf9e5bb207088765a8d984ba1154df924