Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a8139ece5af71f…

MALICIOUS

PDF

80.5 KB Created: 2021-03-18 09:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 983106ea3245298368efa4b41cb60249 SHA-1: b54278e29ccd3ec17265d0adb7bde99a4393612a SHA-256: d6a8139ece5af71f97c14c9b1980a9daae622899b7154d9ea2a5e64ff44d6bd6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/123?utm_term=broken+but+beautiful+ringtone++pagalworld PDF link annotation
    • http://sanatoriy-izumrudny.ru/seiko_solar_chronograph_v172-0ac04bli9.pdfIn PDF document text
    • https://cdn.sqhk.co/tekemozuj/BhhEOii/dollar_tree_near_downtown_las_vegas.pdfIn PDF document text
    • http://natiral.space/film_khasi_jeff7bxib.pdfIn PDF document text
    • http://shtangye.xyz/2018_roadtrek_simplicity_owners_manualvr18b.pdfIn PDF document text
    • http://reweder.site/fovikev9pxwg.pdfIn PDF document text
    • http://ses-paypal.com/dulanulibiwavikufoziwhk07.pdfIn PDF document text
    • http://negozio50sconto.info/gajopujaru0sa3v.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/WUucoji/game_call_of_magic_mod_apk_latest.pdfIn PDF document text
    • http://eagleaff.com/44345749353kd5eg.pdfIn PDF document text
    • https://cdn.sqhk.co/fubemabofof/YuoXhhf/mini_motor_racing_free_download_for_pc.pdfIn PDF document text
    • http://regse.website/bses_yamuna_duplicate_billotvsq.pdfIn PDF document text
    • http://optarfes.com/mathematical_analysis_second_edition_apostolbkjbz.pdfIn PDF document text
    • http://demask.fun/hp_5510_will_not_printn651z.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/ia8jegg/44712326257.pdfIn PDF document text
    • http://thepropheticapp.com/is_the_youtube_family_mormonufgu6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://764dfaed-7091-4b1c-a8ff-ceb5b694923f.filesusr.com/ugd/4bafdb_69b6e82116ce4d17ab73ac3ca8805ff0.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_0aadcfc5ea0f4b95af7c87bc6c225673.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/minefifuzezetapuz.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/nulukonutofipus.pdfIn PDF document text
    • https://2eb5e741-fe40-4e13-9a70-20af0821b154.filesusr.com/ugd/6cf56c_5ad4bd9e1bfb43f4a01514af2396c8ce.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_00d099edd892428ca3453a8b91f699cd.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_off0000fdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEA 5376 bytes
SHA-256: 311f23ee13a0621fa509912ba491cc23eb180207a95b7a0d8fc21985928241e2
font_01_sfnt_off0001105b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105B 11052 bytes
SHA-256: cf6767a17f7027e37b1018ed857db1e1993a2879bbee992206b16768454416df

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