Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f9aa0015e6aca5…

MALICIOUS

PDF

82.2 KB Created: 2021-03-31 21:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 78a7a3410b52a7521f494be71e4d4707 SHA-1: d4d9a1ed4d6d5aceeb4064d467718ee91fd5fcb5 SHA-256: 25f9aa0015e6aca5d47a9d716f35db3f97770e723e290680459bb53e899ea067
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://bologen.ru/wix?keyword=dz09+user+manual+pdf PDF link annotation
    • https://dosifezo.weebly.com/uploads/1/3/4/6/134619581/8129130.pdfIn PDF document text
    • https://xukokamil.weebly.com/uploads/1/3/4/3/134317204/kuvuvuwiliza_lizizakixidikaj.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/reporting_levene_s_test_in_apa_format1jru6.pdfIn PDF document text
    • https://xixotileko.weebly.com/uploads/1/3/4/0/134018517/45525a164.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/9729360.pdfIn PDF document text
    • http://mx50off.pro/kunametofoluxupl150j.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/1735282.pdfIn PDF document text
    • http://spainsale.pro/lawigubigapjfcv.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/5d060b982.pdfIn PDF document text
    • http://segwaywheelchair.ru/42218236250g4eyc.pdfIn PDF document text
    • http://forexgeeks.net/the_wedding_song_movie_cast58b6d.pdfIn PDF document text
    • http://modernstyle.pro/91382969295ibuwx.pdfIn PDF document text
    • https://rogaturo.weebly.com/uploads/1/3/1/0/131069781/sinajip_vewigewibiraf.pdfIn PDF document text
    • https://zarekekokubudal.weebly.com/uploads/1/3/1/3/131398532/laduxipowilax_xuratoxeraxe_lorulezuxilakud_logute.pdfIn PDF document text
    • http://subbellassecret.com/c.net_interview_questions_for_3_years_experiencem64si.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/10798e12-8f13-4a49-afa6-a4bda4ad7433/gre_test_in_pakistan_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a267ed-f1fb-4a29-af5f-2387b755919a/how_accurate_is_the_omron_7_series_blood_pressure_monitor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1f24ca-18e3-48cc-89a5-d28d308e5e9e/39053208898.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_off0001027d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 5532 bytes
SHA-256: 9b1e3938be4af793c0302aeb83889c4cd58fcd34f88ae451d6aa4d2398e4378b
font_01_sfnt_off0001153f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153F 11316 bytes
SHA-256: b4234c76b10411b6fecdad008c9469c3772f2159f7919812f917ae7fa83e7265

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