Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8238ee3d2c88bdd…

MALICIOUS

PDF

80.0 KB Created: 2021-03-24 15:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9d899e9cd9a8747ee3b2236627c4e1c SHA-1: 7d0482fc11b52357d523ce8769881796c3b40075 SHA-256: a8238ee3d2c88bdd9f4efc75e1ef8e31cea5e1bb19802e0ec122ec8ecd507f5b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URL pointing to a domain that appears to be involved in distributing malicious content, likely to trick users into downloading further malware. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=autocad+civil+3d+2018+tutorial+youtube
    • https://xowonijateroz.weebly.com/uploads/1/3/1/3/131380337/gamufezotumagina.pdf
    • http://boforotaje.mywebcommunity.org/asus_rt-n16_default_password.pdf
    • https://vexakoloninabi.weebly.com/uploads/1/3/4/8/134851928/4f15da201823939.pdf
    • http://tiwilofojifig.sportsontheweb.net/xakuwetatumovazolenakofo.pdf
    • https://losopaxirusegu.weebly.com/uploads/1/3/0/8/130813120/cd9756.pdf
    • https://rubavuwo.weebly.com/uploads/1/3/4/4/134403239/wotowopuv-gorusezit-kaberotim-piwaxetu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/22e7f30c-cc71-42d3-8621-6a7a7670a4a8/50462035836.pdf
    • http://zuliguw.rf.gd/muvafedavutorufexowujel.pdf
    • https://s3.amazonaws.com/desenaz/transforming_rectangular_equations_to_polar_form.pdf
    • https://s3.amazonaws.com/mawesenasijoser/palayathu_amman_movie_free.pdf
    • https://s3.amazonaws.com/retobifulipo/wemifobuxiril.pdf
    • http://zoguberuwanu.rf.gd/adp_6-22_army_leadership_quizlet.pdf
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_41ca64b3e958423693f867ab88b7e2f9.pdf?index=true
    • http://zogujiduguku.epizy.com/tupexesavimixaxi.pdf
    • http://zoxuditavuvov.rf.gd/kone_scenic_elevator_planning_guide.pdf
    • https://uploads.strikinglycdn.com/files/fffe9ae0-bb5d-49b5-be04-c5cdcc3f7d82/youtube_pinoy_channel_tv_patrol_today.pdf
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_e024750fbbdf4278adc4304205a93668.pdf?index=true
    • http://wutorokanotomav.onlinewebshop.net/pafuz.pdf
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_4808ecc979eb4aea89ae524a3830f640.pdf?index=true
    • http://zemufobure.rf.gd/fafovekujoligiwevajex.pdf
    • http://sujunutab.atwebpages.com/xiwuvebi.pdf
    • https://s3.amazonaws.com/zikeko/49856978973.pdf
    • http://wivaxodi.onlinewebshop.net/absorption_spectrum_of_chlorophyll_a_and_b_and_carotenoids.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f876.bin
c91e3a6cfb5dbdb6539ad0e028568adc0d1736309c56a86f9c951ec291db8f61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 5728 bytes
font_01_sfnt_off00010c17.bin
5e4c17e758e8a7ecefaf982bb98700005ef7787853545e2db62676b07b4b06c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 11240 bytes

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