Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60ecacea85c7494…

MALICIOUS

PDF

77.4 KB Created: 2021-06-03 10:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0e620d934770376ad3d985c4d8f5c88 SHA-1: 786d9c51e794ba3523cad8c46a224b5e27011969 SHA-256: b60ecacea85c7494d5aa3cb0ca28bbb83726477f2d2ddca2aa38f7830273ed3b
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a mass of such links. One of the primary links, 'https://pixomot.ru/pbw?utm_term=abune+petros+pdf', is flagged as suspicious. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure points towards a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/pbw?utm_term=abune+petros+pdf
    • https://varowuzogan.weebly.com/uploads/1/3/1/8/131856285/jeparam_pasenoxop.pdf
    • https://sowofodifidem.weebly.com/uploads/1/3/1/8/131856479/9688541.pdf
    • https://static.s123-cdn-static.com/uploads/4479718/normal_6007463de27a1.pdf
    • https://pudexaxetodeli.weebly.com/uploads/1/3/2/6/132683251/ranowusanapus.pdf
    • https://falopizesolirod.weebly.com/uploads/1/3/1/3/131379111/6092591.pdf
    • https://wabaxudazisivi.weebly.com/uploads/1/3/3/9/133986682/1917194.pdf
    • https://bezigetomesijag.weebly.com/uploads/1/3/1/0/131070469/5530918.pdf
    • https://cdn-cms.f-static.net/uploads/4474720/normal_6017c6911b76c.pdf
    • https://pogerukafitili.weebly.com/uploads/1/3/1/4/131437037/4943107.pdf
    • https://nefadojajekewa.weebly.com/uploads/1/3/0/8/130874163/3903173.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mogulobobis.pbworks.com/f/should_you_stretch_insertional_achilles_tendonitis.pdf
    • http://pulixojesu.pbworks.com/w/file/fetch/144507954/pojirefebedeperidikevov.pdf
    • https://uploads.strikinglycdn.com/files/3912d228-f4a7-47ca-8308-03ce5552ee65/braun_electric_shaver_series_9_9290cc_manual.pdf
    • http://mumubib.pbworks.com/f/51320434886.pdf
    • http://nilanom.pbworks.com/f/bully_anniversary_apk_data_200mb.pdf
    • http://nitezug.pbworks.com/w/file/fetch/144520512/preguntas_y_respuestas_del_cuento_los_crmenes_de_la_calle_morgue.pdf
    • http://bovojigu.pbworks.com/f/adobe_acrobat_x_pro_serial_number_list.pdf
    • http://zewalar.pbworks.com/f/download_game_mortal_kombat_trilogy_android.pdf
    • https://uploads.strikinglycdn.com/files/14f2018c-4cc5-4009-b7a9-951c48c0280b/amd_ati_mobility_radeon_hd_5000_driver_download.pdf
    • https://uploads.strikinglycdn.com/files/a3b2f838-390f-4a41-861e-f907d6acc7ec/guliwa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc59.bin
20d8c8476735776bfc93d1a9a789d1edcebfc750442a368d4916ae8b55f6d9c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC59 8580 bytes
font_01_sfnt_off0000f2ff.bin
bad2dd9f02c51395ccee1820d6834ba398da4feeccaea48c012d284e4610935a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 4924 bytes
font_02_sfnt_off000103cb.bin
1a704256d6573f590fb2b56fbbbdf734e9120d6d00b4cb15e0b5ddaafec73835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 10224 bytes

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