Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65b0b13855e4235…

MALICIOUS

PDF

85.7 KB Created: 2021-05-11 18:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a2b9d2ae7dfee653b99f04d04b1c4e92 SHA-1: 284efb555295aefcb8ef22bc31215dfe51614362 SHA-256: e65b0b13855e42355c4f5c03fb34d4d91e55816d9fee6f6928ac58d356bdc7b5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. The presence of external URIs suggests an attempt to redirect the user to a malicious site for further exploitation.

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://xezojetit.ru/strik?utm_term=level+capacity+strategy+characteristics PDF link annotation
    • http://jofifuneku.medianewsonline.com/43973301281.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/9hXjguq/tai_game_i_am_archer.pdfIn PDF document text
    • http://kexolifowuj.medianewsonline.com/gabil.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/what_are_the_main_causes_and_effects_of_climate_change.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/arellano_marketing_libro.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/bQhfXhj/tojebat.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/best_annotation_app_for_surface.pdfIn PDF document text
    • http://nuxagoliwanep.22web.org/duwebiferujobokufeko.pdfIn PDF document text
    • http://xomofaki.getenjoyment.net/69716789772.pdfIn PDF document text
    • http://sejujanovemo.medianewsonline.com/42010367304.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/djjLkhh/gem_hunting_in_washington_state.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/25c100af-350c-497f-ad8b-b56d751f149d/janiditanidisubegaferujog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/096a70de-6577-402a-8e36-112639188686/how_to_enable_mods_skyrim_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/business_management_ib_oxford.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69827eb9-39e2-4627-a627-40a112b1902b/dukederuro.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/vabifiregidebamig.pdfIn PDF document text
    • http://zawozunilutufu.rf.gd/what_does_the_climate_of_an_area_effect.pdfIn PDF document text
    • http://kowotasube.epizy.com/lepuboxibezovufitalapalod.pdfIn PDF document text
    • http://dupojuve.epizy.com/43326976895.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/what_is_ms_word_format_resume.pdfIn PDF document text
    • http://wesatume.atwebpages.com/almagest_english.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/90590692501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c6caca-ba7c-43bc-9b29-57918e82f93b/92859511120.pdfIn PDF document text
    • http://welididoseburiv.epizy.com/who_do_intps_get_along_with.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10469 4872 bytes
SHA-256: b8c54781ff4daa0820dc215472a073f01339016cbe23c9a5d4474a0d08cea0dc
font_01_sfnt_off00011510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11510 11220 bytes
SHA-256: 7509bd7dd39a3a5663cf84f4ba92ebd94fb7ba8326bb0c394275e8c29c476b6c
font_02_sfnt_off00013ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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