Malicious PDF — malware analysis report

Static analysis result for SHA-256 761f0299ff8d60e7…

MALICIOUS

PDF

75.0 KB Created: 2021-04-23 21:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 699bfa8c34cee9d920c1619434f1ea42 SHA-1: 12837a483a4fb608b1d8de7654c591339e0ac21a SHA-256: 761f0299ff8d60e77879798f6185acf869a27b012828d06dbca8224e180bbf50
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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://zajinet.ru/strik?utm_term=can+i+use+any+remote+for+my+vizio+smart+tv PDF link annotation
    • https://cdn.sqhk.co/zivuputid/ixljbgj/ganugupojavumav.pdfIn PDF document text
    • https://cdn.sqhk.co/degawatoze/1ijhSjj/58179631335.pdfIn PDF document text
    • https://cdn.sqhk.co/turomixo/ijb5gdI/82819279097.pdfIn PDF document text
    • http://dresdenpharma.ru/crowds_and_power_elias_canettifow7s.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/gKA7hia/golazoluzatamagud.pdfIn PDF document text
    • http://woodlesenka.ru/kojuvuzijunifuzumume9nkmq.pdfIn PDF document text
    • http://kikifikoxije.mypressonline.com/scrambled_sentences_exercises_for_beginners.pdfIn PDF document text
    • http://muvepifare.mygamesonline.org/the_algebraic_theory_of_quadratic_forms_lam.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/bucher_hydraulic_pump.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/b6384801-3505-4ad4-8f70-4d3385185748/how_much_does_a_toyota_corolla_battery_cost.pdfIn PDF document text
    • http://maguzudag.epizy.com/ejercicios_de_anualidades_diferidas_matemticas_financieras.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/film_3_dara_2_full_movie.pdfIn PDF document text
    • https://4fd7ac12-06e8-439c-96a9-7636004ccb32.filesusr.com/ugd/9554ab_4fa2c8b95c27411c83a309e0d440b606.pdf?index=trueIn PDF document text
    • http://somasetowijo.myartsonline.com/sexajofirijirorogumex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31dfa9d5-0960-4996-b505-bb3b4da15e19/qfx_rem-115_jumbo_universal_remote_codes.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/58138903460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee9f040-3baa-404a-a5f1-52e671f45d78/10060429494.pdfIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_3d26c4cb7c084ec4ae0f46cd809ea868.pdf?index=trueIn 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_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 4996 bytes
SHA-256: 080df5bfc7504ecfe58c6a9e408e81dbd6bbdfa94ceea1bb02085a81ec9dc0a6
font_01_sfnt_off0000f92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92D 11216 bytes
SHA-256: a63abc55cd34d4bd0cd24c9144f0dabfe995a6cdd7425e12b7eaa632f56c550d

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