Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e613847078ae58…

MALICIOUS

PDF

85.7 KB Created: 2021-03-08 03:36:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0133055553326b6591db4bd1c179b647 SHA-1: 9d39528fdd95aed0087a5d09831fa331ff90614e SHA-256: b0e613847078ae5866a274d9c996e6206df2bdf39d12ba238019b007aafda341
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded links suggest it is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=it%2527ll+be+okay+meaning In PDF document text
    • http://usesol.xyz/obd2_mini_elm327_wifi_interface_adapterknchz.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/ib6EWLr/iot_space_heater.pdfIn PDF document text
    • http://xevidome.iblogger.org/hernia_de_hiato_tipos.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/what_spices_are_in_togarashi.pdfIn PDF document text
    • http://indir-kazan.com/81506700680gn2z7.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/71535659301.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/gfQggje/tap_tap_little_chicken_running.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/gf3rq91/download_game_zombie_age_3_premium_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/shiVhfi/kuxugimuwuwubumujirape.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/jiduzitixulivipiriki.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/cgeLIjh/21857955702.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/16819803660.pdfIn PDF document text
    • http://igbusinessabouthelp.com/23673840186sl25r.pdfIn PDF document text
    • http://vixitatevejiwo.getenjoyment.net/garmin_forerunner_220_istruzioni_italiano.pdfIn PDF document text
    • http://springtea.space/new_year_party_invitations_templateszftxv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakogez.myartsonline.com/16332817581.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/where_to_buy_a_timex_watch.pdfIn PDF document text
    • http://baletax.onlinewebshop.net/nintendo_error_code_2-arvha-0000.pdfIn PDF document text
    • http://banebogol.epizy.com/55218260883.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_38bf0b37bade4e95ad0c9d8f38cc1acd.pdf?index=trueIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_fbb787908bd148899e8fbf8fc2e2b09b.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE871 6804 bytes
SHA-256: 28b39597e1b5a207952c2ded4d6a2b70a449ccc08cce7f12a798387c99f032c3
font_01_sfnt_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 5008 bytes
SHA-256: b327951a28f3754b2b3379f8e87c966233217382a7bbb0303876e612a84ad476
font_02_sfnt_off00010ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 12008 bytes
SHA-256: 8dda5f7a2d59fb1454b2cf3c8afa8cd445892fca35e7cb45851ef34ff9215431
font_03_sfnt_off000131dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DD 16492 bytes
SHA-256: ee139d6c6a2d6ea82b054f9fc882acb3aea8f775be819f50524a2f9d44cc468b