Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cfb862585723e9…

MALICIOUS

PDF

83.1 KB Created: 2021-05-14 22:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 021f868842e43c808e5d9cfc09dff5ee SHA-1: 6bec280cd37e5562b10e8d2065981240ac7bee03 SHA-256: 30cfb862585723e9f9440810bfde737b93baa17a2ce8c5b69fc20d18d23bbc69
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The primary URL, 'https://zajinet.ru/wb?keyword=what%20are%20the%203%20elements%20of%20deterrence', suggests a phishing or scam attempt by masquerading as a search result. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://zajinet.ru/wb?keyword=what%20are%20the%203%20elements%20of%20deterrence PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449603/normal_601603df2d311.pdfIn PDF document text
    • http://extrameets.fun/snapper_tractor_batteryru593.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/VVHja2v/angular_5_form_input_binding.pdfIn PDF document text
    • http://basvuruizleme.online/849234367367xcdu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482027/normal_6005b033b1c1e.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/N3TLihd/99846836905.pdfIn PDF document text
    • http://classicalnaturally.com/alcidion_group_limited_annual_reportkcgpm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_603f1742b1bb9.pdfIn PDF document text
    • http://microdigitalmeter.xyz/4596209813stgmk.pdfIn PDF document text
    • http://fobifisoba.22web.org/how_to_record_dividend_in_qb.pdfIn PDF document text
    • https://cdn.sqhk.co/puninuzono/aE1Lib4/30460406307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_603611fd8506d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466370/normal_6003dccd9bb86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_6064d7292fc22.pdfIn PDF document text
    • https://cdn.sqhk.co/fepixuzutol/w2if9XP/74426987298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_603e185094102.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/iidEohj/broken_age_android_requirements.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://furamexexi.rf.gd/rupobobifosufarugibusak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c8d080-b865-4a80-af90-b02d4b29ce02/ge_8-device_universal_remote_control_41567_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deb279f5-6adb-42b1-97c5-5e3ddb15f3bb/70529933236.pdfIn PDF document text
    • http://filulakakinu.epizy.com/tekiwunusokuniloxujop.pdfIn PDF document text
    • http://puloxivomavari.epizy.com/bise_lahore_matric_result_2020_gazette.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ecf3b4-16ed-435d-80e1-31e41321b09c/dell_precision_t7500_max_ram.pdfIn PDF document text
    • http://lepejojesel.rf.gd/naterikutadokulezilux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c626cf6b-4fcd-40ef-b36f-ac00bec3bd87/presto_dehydro_digital_electric_food_dehydrator_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9253122-1632-43ec-8d07-5fac4fb72c26/pepasofalebukel.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_off000107ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AB 5440 bytes
SHA-256: 26513ee11c11127ee48072fdf2a8e46428e283b5cea4f7073f1b894790c5b2a0
font_01_sfnt_off00011a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A07 10804 bytes
SHA-256: b3b70cd7a01183a26c90f0124f6972d807dc33fddec855863003db6ff1ff225b