Malicious PDF — malware analysis report

Static analysis result for SHA-256 d175d62f031a6e97…

MALICIOUS

PDF

101.1 KB Created: 2021-04-29 01:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 069a2bc996daeb366247d399ad00f2b0 SHA-1: 7b4d9947f4d6c14c030ea91526d554f62bf62997 SHA-256: d175d62f031a6e97513990aa4c624ed0469d60a9f5e1b0bad08ba71920f6e50e
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL pointing to 'https://jacksth.ru/strik', which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, but the presence of external URIs and the overall detection indicate a malicious intent to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=what+is+tcp+ip+layer
    • http://nurigoluda.mygamesonline.org/koraw.pdf
    • http://dexiserabasavo.mygamesonline.org/bionic_contact_lens.pdf
    • http://poxumanavofeboz.scienceontheweb.net/56726311273.pdf
    • http://gobigs.space/dragons_rise_of_berk_gameplay8n41m.pdf
    • http://tersq.fun/mini_dachshund_breeders_washingtonocpin.pdf
    • http://lnstagramsupportinfo.com/vonifokirujewuziwanxp0i.pdf
    • http://zukesijinizik.mywebcommunity.org/binomial_theorem_quiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rabelame.atwebpages.com/gojoxararukanogejuneli.pdf
    • https://s3.amazonaws.com/gurafoga/foursquare_city_guide_vs_swarm.pdf
    • https://s3.amazonaws.com/vudivuzakal/south_carolina_cdl_permit_practice_test.pdf
    • https://s3.amazonaws.com/norozovijalu/vefatotuvuwif.pdf
    • https://uploads.strikinglycdn.com/files/5cfc4195-15fc-4cb5-ad02-49ed1ae3cd80/96683869698.pdf
    • https://uploads.strikinglycdn.com/files/487baf24-0015-46d1-a01c-98bf853fe490/how_to_check_samsung_tv_model_using_remote.pdf
    • https://s3.amazonaws.com/lupuvogotog/ximogiguvikowuvarebowuz.pdf
    • https://s3.amazonaws.com/dobikasukavu/abret_eeg_documentation_form.pdf
    • https://uploads.strikinglycdn.com/files/bf1c1f73-5639-4f8a-be92-ba17f8765bae/how_to_cook_roast_in_a_pressure_cooker.pdf
    • https://s3.amazonaws.com/jozaponi/lefabuvejajofutiparewowi.pdf
    • https://s3.amazonaws.com/bogijexu/62262705865.pdf
    • https://uploads.strikinglycdn.com/files/9097b6ea-75c6-46be-b45b-ed4fcb77d7b4/chi_health_center_omaha_seating_chart.pdf
    • https://uploads.strikinglycdn.com/files/cf391eac-a207-413a-b6df-ed1b087b7eed/josubaj.pdf
    • https://s3.amazonaws.com/sifawekujiki/camscanner_apk_onhax.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_off00014fdf.bin
850d64f5c2f016b5c70c5e07ca98d0b8671b140163f078ad8a2df3f310cf9914
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FDF 5136 bytes
font_01_sfnt_off00016166.bin
b426d1d6e6d717c1a5543f12d6f0e68120ee1a7c92b49cacd1d18a7353e3ef8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x16166 10964 bytes