Malicious PDF — malware analysis report

Static analysis result for SHA-256 912d57aa85ac1868…

MALICIOUS

PDF

79.2 KB Created: 2021-03-21 05:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5ed40f04d09dfddc78ca0145e9417da1 SHA-1: 1703bebca9cfdab43f675ebcabf5dacd4bb673e5 SHA-256: 912d57aa85ac1868cb4cf8c3bd16466fbdc7b90d63a216b1b5904b8353309e40
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=bukhari+hadees+in+urdu+pdf PDF link annotation
    • http://makamar.xyz/detebiribc3m4g.pdfIn PDF document text
    • https://cdn.sqhk.co/pefatipi/W8gd1DF/meteor_shower_for_april_2020.pdfIn PDF document text
    • http://astropsychology.website/what_does_shooting_the_elephant_meanxbkuc.pdfIn PDF document text
    • http://richmaya.site/steve_jobs_lecciones_de_liderazgo9elgh.pdfIn PDF document text
    • http://gavokofubafixi.getenjoyment.net/catharsis_in_oedipus_rex.pdfIn PDF document text
    • http://viewcreditscore.info/givigusozikudazozaxotabuw00wd.pdfIn PDF document text
    • http://hookup753.fun/toshiba_video_dvd_recorder_manualiymjq.pdfIn PDF document text
    • http://fezelegafefuv.mywebcommunity.org/dd_forgotten_realms_map_chult.pdfIn PDF document text
    • http://russianstravel.ru/so_campos_de_atuao_da_psicologia_jurdica_excetodvdyw.pdfIn PDF document text
    • http://nicepics.xyz/importance_of_acoustics_in_architecture0osse.pdfIn PDF document text
    • http://mapenibo.scienceontheweb.net/7332370524.pdfIn PDF document text
    • https://cdn.sqhk.co/fokivetezabu/jjK2djg/polaroid_originals_color_film_for_i-_type.pdfIn PDF document text
    • http://naturalgood.space/heat_and_mass_transfer_solution_manual_4th_editionx2unn.pdfIn PDF document text
    • http://bestcreditcheck.info/massey_ferguson_135_zenith_carburetor_rebuild_kitf7ve0.pdfIn PDF document text
    • http://english-10.site/on_the_banks_of_plum_creek_free_audiobook9mj99.pdfIn PDF document text
    • http://mkr-olimp.info/66928870282h4enr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gifonuva.epizy.com/regulation_of_purine_biosynthesis.pdfIn PDF document text
    • http://dokajita.rf.gd/corrugated_plastic_sheeting_cape_town.pdfIn PDF document text
    • http://zetakid.rf.gd/european_heart_failure_guidelines_2019.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F1 5212 bytes
SHA-256: 47773eded7748e635828f727e3a79d83b39f2aa95272dcf3eb15cc26fd6e4f5d
font_01_sfnt_off0000e3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AA 13224 bytes
SHA-256: b4e1e64e0c35b209b0ce34355493776e21516ff3fd4477f795b1e9adf2d1d751
font_02_sfnt_off00010e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E00 20172 bytes
SHA-256: 54c23a48037561ea0bfb55db1c43056f579466b3dc096d64ae224eaaa17abfc7

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