Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d59488f17d2256…

MALICIOUS

PDF

76.9 KB Created: 2021-03-10 23:15:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0203aaeab8d9ab8f53267d5c8934cc77 SHA-1: 6f163d5223e2d0c41ef4865c773d8dc36d275d54 SHA-256: 33d59488f17d22565efbbb36924207920e131bd9bd938b7193108a01ee1035ab
186 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document attempts to solicit sensitive information such as private keys or backup codes. The presence of numerous external URIs, many pointing to disposable hosting, further supports a phishing or malicious download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://lozipotod.ru/award?keyword=mastering+bitcoin+book+pdf+download PDF link annotation
    • http://tixanijematewe.mypressonline.com/35152102545.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/bhb7lhc/dare_you_to_move_chords_capo.pdfIn PDF document text
    • http://invitesistem.ru/directions_worksheetjqw20.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ifja7ii/wabawobudamovawaseju.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/ahae8ji/ninety_six_west_brenham_texas.pdfIn PDF document text
    • http://acupofjacob.com/the_monkees_im_a_believer_shrek8vkdx.pdfIn PDF document text
    • http://tozidak.mygamesonline.org/dipexonosefetox.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/what_is_a_call_option_agreement.pdfIn PDF document text
    • http://legionmone.xyz/adverbs_of_place_and_time_worksheetrad86.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/2017_lexus_gx_460_for_sale_near_me.pdfIn PDF document text
    • http://shoop-fh.ru/battletech_mechs_by_factionx49ag.pdfIn PDF document text
    • http://adanakebap.org/app_for_pc_windows_10_free8nk5c.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/pjajggc/90466413729.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/362fa38c-f9cf-4652-a2ed-ad07e1626264/sinulujomegalipebajoza.pdfIn PDF document text
    • http://medexode.atwebpages.com/43285509595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d47527b-f1b2-4a78-8284-d0cdbe460a83/dedokexalezolozekovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b22b2249-195a-4873-ad1b-4b7a13a86a43/38270465535.pdfIn PDF document text
    • http://mojozore.myartsonline.com/alpha_amylase_test.pdfIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_887ce5b02c414256a1aac3d5265f7c7f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5ea25b7-3638-4f30-9c62-a4a8557e3d91/what_does_5_beeps_mean_on_a_dell_laptop.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_ee239cbf28a641f691cc282db21db282.pdf?index=trueIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_f74e8dad809a4fd394bb3b5842de6c36.pdf?index=trueIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_64d81099f4e645d3bfc4234668d3f766.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0ae148-ce7f-49dc-986d-4fb2b698e9c7/ravojodikarigimimotupadim.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_off0000ef22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF22 5624 bytes
SHA-256: dc04aa9b3804caa92584e56ef690e5eb505756dd46c82455df6c7e6d9e852241
font_01_sfnt_off00010272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 10396 bytes
SHA-256: 646d764e42b36f5a015645d1d5c97bb9d3dd98c41ef6cc1566ffafc30e0ba4fd