Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9acb35ad860fbb9…

MALICIOUS

PDF

84.1 KB Created: 2021-04-27 20:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6afe80982f66f364991acc9c7ccbba06 SHA-1: efafc5013ccf923a0b36e77323a2e00d20ee1e56 SHA-256: f9acb35ad860fbb96ec17990502615825851b26ea02643f8073b3cb9d121123b
126 Risk Score

Malware Insights

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

The PDF file contains numerous URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to movie streaming, likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/strik?utm_term=motorcycle+diaries+full+movie+online+free+with+english+subtitles PDF link annotation
    • http://juvizex.sportsontheweb.net/73380235289.pdfIn PDF document text
    • http://kevekozulanilim.sportsontheweb.net/cerebral_palsy_occupational_therapy.pdfIn PDF document text
    • https://sunudufexune.weebly.com/uploads/1/3/0/8/130874439/satodurorujo-zajujetiledax-sakezisufe-rojop.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/90327342188.pdfIn PDF document text
    • http://fafabil.getenjoyment.net/nuwogipuxuvag.pdfIn PDF document text
    • https://dirasikazeta.weebly.com/uploads/1/3/1/3/131379856/2731960.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/2623395.pdfIn PDF document text
    • http://xiguxivevov.sportsontheweb.net/bncc_2020_ensino_mdio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490757/normal_602bf88291aab.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/gozuduroz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379602/normal_5fe112571d257.pdfIn PDF document text
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/fabubemonukaj_fodin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_5fd041490c15b.pdfIn PDF document text
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/3269446.pdfIn PDF document text
    • https://fitezaxuju.weebly.com/uploads/1/3/4/7/134724711/zikizewomugun.pdfIn PDF document text
    • http://tujidal.mypressonline.com/lajofajuza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bedisil.epizy.com/bokozudefimodupune.pdfIn PDF document text
    • http://kutoduno.rf.gd/how_to_read_korean_books_online.pdfIn PDF document text
    • http://jepojofugag.rf.gd/46128250661.pdfIn PDF document text
    • http://nuzekifigusibu.rf.gd/rajaxasukaredigeboxarel.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/why_does_my_smoke_detector_have_a_green_light.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 5716 bytes
SHA-256: 0078f8220a2a4b63241b6d7fc19e187d71d810fca312398b0583aa64e2a22e4d
font_01_sfnt_off00010e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E81 11212 bytes
SHA-256: 5cf289d0ce99e5274b550f79be9e7b9633048d4c313fb169dea5ab77d12156bf
font_02_sfnt_off00013462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13462 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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