Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a78d9b420d8935…

MALICIOUS

PDF

75.5 KB Created: 2021-03-05 22:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d9e20ad4a06dc39f69cf7da3349ac311 SHA-1: 736293e2952ce3fae2271699ac79ee33e51e6790 SHA-256: 26a78d9b420d89358df994284d4dc2e3747b26f6d28c0b46353b8196754bed4c
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The primary URL, 'https://botokaw.ru/wix?keyword=discord+desktop+notifications+not+appearing', is designed to mimic a search result, likely to trick users into clicking through to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/wix?keyword=discord+desktop+notifications+not+appearing PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450427/normal_5ff1cdfca0e74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_6025ac6b7a8b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426945/normal_601b8b6db2538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5fd1bc302a4a2.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/bAkiehh/82948562578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481819/normal_600b3353ee8ef.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/1hakyha/psx_emulator_for_ps_vita_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_6034112452fe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477163/normal_60322001a0ac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5fd0ecce901eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_601e093ef0fc7.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/207ada57-c649-4245-a9e4-9f5d25e00088/after_book_series_review.pdfIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_7a8d3422aa8b4728a1b39e582ff72423.pdf?index=trueIn PDF document text
    • http://bakisuv.rf.gd/youre_stronger_than_you_think_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e0c5d2-5d85-49df-bf72-d5e1db136ccf/the_secret_life_of_walter_mitty_streaming_vf.pdfIn PDF document text
    • http://nabiderafiwo.epizy.com/household_bills_budget_template.pdfIn PDF document text
    • http://loletusu.rf.gd/how_to_run_pro_tools_without_ilok.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_ea36f73033d649649cd367872174427f.pdf?index=trueIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_7cf57b1e5f84455ea98e35ac1d47be25.pdf?index=trueIn PDF document text
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_416dd766d4244b2d875e6a8b96c90822.pdf?index=trueIn PDF document text
    • http://jejopufopox.rf.gd/fofowivekofimoxuxijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67167e85-b2df-4c6f-9149-ada27c00bc6c/the_hour_that_changes_the_world_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c38361-9b87-43a4-9e3f-5e5e459fc592/vonazinizizagorenuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a287f40f-f3e2-43ac-8c2e-5943877fe10c/54218698267.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_off0000eb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB29 5352 bytes
SHA-256: 5c2c581d0a7dde7fc4ac61d2298716a69508709721775786b15dbe519370f68f
font_01_sfnt_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 10124 bytes
SHA-256: ed2893e86531a941341347c1e9aa220d374a80c9b811ae32f444f029b8a9d0cc

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