Malicious PDF — malware analysis report

Static analysis result for SHA-256 205770c95f0f8bd0…

MALICIOUS

PDF

95.8 KB Created: 2021-03-05 13:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0efe5967b6f1e12c76b7c324c999237a SHA-1: e299bccf140a92f906e3cc48b3ea746772b69d4f SHA-256: 205770c95f0f8bd031eee617e01c9e32ce92c8bf57c18715ef026736d899aff1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and exhibits characteristics of a link farm. The primary URL, https://maypoin.ru/strik, is likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=what+are+the+characteristics+of+a+godly+man PDF link annotation
    • http://pevazaw.mypressonline.com/samsung_ln32b360c5d_price.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/javixegokusijenivisezo.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/lizovotofapimipon.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/40627146687.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/nilonigoveluwo.pdfIn PDF document text
    • http://newsportstechnology.ru/5110524019753tht.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/how_to_charge_your_jlab_wireless_earbuds.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/if_u_dont_have_time_for_me_quotes.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/honda_foreman_service_manualqfbyz.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/motorola_radio_mic_screw.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/jejanugukuliwene.pdfIn PDF document text
    • http://drive4mclaneaustell.com/how_do_you_cite_a_newspaper_interviewlmnzc.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/1573418811.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/navukud.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/troy_bilt_super_bronco_xp_54.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/fatazirifelutagek.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://tuzuxutetug.atwebpages.com/85319772090.pdfIn PDF document text
    • http://tizesabukabel.rf.gd/85215874216.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/pediatric_abdominal_trauma_guidelines.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/61967298120.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_off00012d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D37 5336 bytes
SHA-256: 4e74d88bead3b44fb7db19301d0c4ac8f6cdfdbcbd936a703129eb2aa6913f0c
font_01_sfnt_off00013f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F44 10744 bytes
SHA-256: ed54c4d07208a4e267be4adb4d4f56bf2ca6210054343bbc94cd10da086ab65c
font_02_sfnt_off000163b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163B5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378