Malicious PDF — malware analysis report

Static analysis result for SHA-256 591b63e77c50f0ab…

MALICIOUS

PDF

83.8 KB Created: 2021-03-04 23:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a7fd230e807743481c218afc095bb918 SHA-1: 67bfa6ab9359425b72faa5bca603394ac9fe8084 SHA-256: 591b63e77c50f0abd78d01e6249dae6cc1a6c82244f99c36048829e2234fd18a
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a prominent one leading to 'ponafet.ru', suggesting a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for such lures. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=a+night+to+remember+book+sparknotes PDF link annotation
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/lopad.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/how_to_do_a_buzz_cut_without_clippers.pdfIn PDF document text
    • http://sy0n.icu/apple_user_interface_guidelines_buttons4v747.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/fender_super_champ_x2_amp_model_list.pdfIn PDF document text
    • http://nekazebije.iblogger.org/62287268546.pdfIn PDF document text
    • http://covid-19online.site/tipos_de_funciones_linealesa0f4i.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/why_is_my_logitech_keyboard_not_typing.pdfIn PDF document text
    • http://believes.space/associate_android_developerb7f8x.pdfIn PDF document text
    • https://rifubagozoj.weebly.com/uploads/1/3/2/6/132695416/rujuvudogiper_petes_bobusadek.pdfIn PDF document text
    • http://daravto18.ru/hanako_good_endingpjoso.pdfIn PDF document text
    • http://boxidodo.22web.org/famogutedapujexix.pdfIn PDF document text
    • https://lutomired.weebly.com/uploads/1/3/5/3/135316507/vetabife.pdfIn PDF document text
    • http://changepass.online/lawirexudagefesazofevozj3rb.pdfIn PDF document text
    • http://maxapur.22web.org/google_assistant_for_windows_xp.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/lekezaru/narasimha_full_movie_in_tamil.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_5837bdbc2e914199a488af5fb35c2826.pdf?index=trueIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_b6afa6d88bb048e89be252cf61b72c49.pdf?index=trueIn PDF document text
    • http://kofaxafogi.myartsonline.com/which_is_better_janome_or_husqvarna.pdfIn PDF document text
    • http://suwujidewo.rf.gd/3864186798.pdfIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_47c4481d6cce4f5fabe88ec6617fe9c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panokojol/24635688629.pdfIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_81d4f79b875843af9df882bdfdc701f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitok/sunuxa.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/hoover_floormate_edge_hard_floor_cleaner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/nuvomigasozoraxifiw.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/dalezet.pdfIn PDF document text
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_30d98947aed2414f8cbc77660a86a768.pdf?index=trueIn 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_off00010a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A47 5392 bytes
SHA-256: 57ca66fdb11a3916ac4b21931f8cb103695721f39bec9b4d92c2f7c81a2ed09e
font_01_sfnt_off00011c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6E 10948 bytes
SHA-256: 14251ca3c7b3edbe40e051c0e22a690facd95c3fe9a946058c444abf244cd25e

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