Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f5069935c46fae…

MALICIOUS

PDF

79.7 KB Created: 2021-03-21 01:30:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7c65b7b71a5b22d6299b93a07b1e172e SHA-1: 7135d4f942e520388f1a37f954baaa062a6b0706 SHA-256: 02f5069935c46faedb6d32f8c7e8f06ccb764519b65c6fbdfe3a86b28b026552
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://pelibifir.ru/123?utm_term=google+chrome+apk+android+4.+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375908/normal_60268f7c30039.pdfIn PDF document text
    • http://zafuwozemupojaw.22web.org/26965814998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498801/normal_6050187231961.pdfIn PDF document text
    • http://juborad.mywebcommunity.org/teriluvupatuxinudokuzi.pdfIn PDF document text
    • http://taxavifosobedul.iblogger.org/5_languages_of_love_worksheet.pdfIn PDF document text
    • http://kifipawatixitaj.iblogger.org/49895523233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445877/normal_60536b6c60ea6.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/how_to_drain_swamp_cooler_for_winter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499622/normal_5fd19ae8017ff.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/6855011558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490269/normal_5fe057e998fa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_603fd5618191a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_6047114ff1a79.pdfIn PDF document text
    • http://vujejike.iblogger.org/dinogojozikagube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nowuzapifara.rf.gd/mixtures_and_solutions_worksheet_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c8baa9-5509-4dc0-9724-de552cad21a1/bawopitazafuwozomufawepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563adc4c-9eb4-44d8-9c14-ec1983bf1fa3/dr_seuss_horton_hears_a_who_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938b0a2c-910e-46e3-bb91-aaf4dbfe1ef5/maytag_centennial_dryer_schematic.pdfIn PDF document text
    • http://wevedikelu.epizy.com/importance_of_effective_listening_in_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b4944f-bed9-4b7a-aad8-ee99faa5efae/57562794170.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/xevonalufapuluvinarowo.pdfIn PDF document text
    • http://vovojoj.atwebpages.com/flowers_for_algernon_book.pdfIn PDF document text
    • http://nesuninabofoda.rf.gd/nursing_theorists_and_their_work.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_off0000f94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94F 5576 bytes
SHA-256: db4505ea6795d1f1e1cad21227d98d8e36de58160922b05fc7f4be3f7b40af2a
font_01_sfnt_off00010c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2C 10804 bytes
SHA-256: b16f2f43530e159d89c9b669f63a6a3a7e40f050d4db511d470d570c7a6c0deb

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