Malicious PDF — malware analysis report

Static analysis result for SHA-256 b510b286c6c76b29…

MALICIOUS

PDF

98.6 KB Created: 2021-03-21 20:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aae0deb181be588052b72e7378cc63a4 SHA-1: 96dc920be444841018f017022ba44f76ae9731b8 SHA-256: b510b286c6c76b290261b3a0333c9d0e9a652f07b2770d7508bd88bc5237e151
156 Risk Score

Malware Insights

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

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 0.9997

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 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.
  • 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://crophysi.ru/123?utm_term=dnd+5e+cleric+guide+2019 PDF link annotation
    • https://cdn.sqhk.co/jimevexir/jahhhj9/63391850088.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/yijTjb6/class_10_maths_ncert_solutions_chapter_8._1.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/nhhgdjb/1019591849.pdfIn PDF document text
    • http://winatesef.sportsontheweb.net/marlin_model_60ssk_price.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/jexHlnv/luragojufinasadigixinev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitamekoliliwe.rf.gd/htc_one_m8_back_cover.pdfIn PDF document text
    • https://fb3efafe-1b0e-41a1-9434-8bf556110c4a.filesusr.com/ugd/de5e41_537d43e17db7438cab7aec0632b7a609.pdf?index=trueIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_977b6ba776184e2389e2ddf5c038e589.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/how_to_set_coordinates_on_a_garmin_gps.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/la_culpa_es_de_la_vaca_para_mujeres_descargar.pdfIn PDF document text
    • http://vafitinupisojud.onlinewebshop.net/vamos_aprender_a_desenhar.pdfIn PDF document text
    • https://00eaa6b3-f026-4720-b00f-fafb40066352.filesusr.com/ugd/d498be_53a14706875e4972914f766365fcd572.pdf?index=trueIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_9aaed82835c242d38369c1ce4e74ad61.pdf?index=trueIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_4f3adaf3a6e546d2b188e7a870dd0dde.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/netflix_free_premium_account_android.pdfIn PDF document text
    • http://sijurajogo.epizy.com/zijan.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/udemy_app_android_version.pdfIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_c32426a003fd494e87edab2cb81d05b9.pdf?index=trueIn PDF document text
    • http://rawegutidum.onlinewebshop.net/578701632.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_7087617c20564434962e967b2f280035.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/formation_d_aide_soignante_france.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14585 5324 bytes
SHA-256: d57d75340f2ca55f0d9bacae623e41453d71d450a46b5a85930c88a9ae1ec92a
font_01_sfnt_off000157c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157C2 10916 bytes
SHA-256: 710c2ebb343d3bd4fe7a9a041996d0a5242b5487bfaeffcd143bde4aa2eb8d4c

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