Malicious PDF — malware analysis report

Static analysis result for SHA-256 710cb6f099cab960…

MALICIOUS

PDF

75.8 KB Created: 2021-03-13 15:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0132897836b0b5428f4854c872e3bd9c SHA-1: 92513f54866a6765a93e493f9c468cc593e788ea SHA-256: 710cb6f099cab960c884047079149bfeed68367fdc21ab85a6671787febc7401
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The embedded links suggest an attempt to redirect users to potentially malicious sites for credential harvesting or further malware delivery. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing or link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/wb?keyword=definicion%20de%20filosofia%20del%20derecho%20autores PDF link annotation
    • http://naturaleone.space/arabic_fonts_calligraphy_free57vuh.pdfIn PDF document text
    • http://tramlaweq.online/duxodedulikem0he8e.pdfIn PDF document text
    • http://repair-monokoles.ru/98014926298gtzun.pdfIn PDF document text
    • http://italysummer.fun/how_to_find_out_my_old_google_accountz7rvy.pdfIn PDF document text
    • http://dress-russia.ru/ms_project_training_philippines_2019nkemh.pdfIn PDF document text
    • http://proita.fun/dobesisosufiwifosabutas078vt.pdfIn PDF document text
    • http://steh-sistem.ru/sibisenokoxirifevotikotaseii8m.pdfIn PDF document text
    • http://vladmer.ru/5814959703253f0z.pdfIn PDF document text
    • http://artelamp.store/resepatiwzfpe.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/78139644688vlduq.pdfIn PDF document text
    • http://instahelpforbusiness.com/nissan_sylphy_car_manualfo460.pdfIn PDF document text
    • http://uablog.website/how_to_start_porter_cable_air_compressori51zx.pdfIn PDF document text
    • http://tevfikyuce.xyz/outdoor_survival_school_oregon6s5hp.pdfIn PDF document text
    • http://ledy66.net/boitier_an-peq-15_led__green_laser_fmasivin.pdfIn PDF document text
    • http://flowerport.market/19624743696da7ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xuzed/setekikevigul.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_6271ae158e984af8ac3606e11ce27a86.pdf?index=trueIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_9ed99ee2f81a47498a83dc67fe76a203.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/corso_italiano.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_eb7cd53945954b6f95c330c411071887.pdf?index=trueIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_bc85edbd86a74a91a8d98ab54ac78bbd.pdf?index=trueIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_75751c19bab842a289f4f82710a66596.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remeranexe/junctions_9_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/25091253904.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/dodif.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_off0000e85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85A 5108 bytes
SHA-256: 86757a0e0249607899d5e6666d3a582ecdf78cc739b127a738eb469f9a2b4f57
font_01_sfnt_off0000f9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BC 11636 bytes
SHA-256: 39f2040d9eb10be2c93d3840cf2f560bf2d30a958411ce4b0acc09e9a807c76b

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