Malicious PDF — malware analysis report

Static analysis result for SHA-256 c881701ebe239797…

MALICIOUS

PDF

66.5 KB Created: 2021-03-06 04:14:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4cca22b309246a4aed95caad85a23f1f SHA-1: 923983761a7ce57a7b81d1d76e8326754fd8941a SHA-256: c881701ebe2397975ab652943007303c0fc773b27c2e626e8e14a3193e1489b7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://baarspo.ru/wix?keyword=digestive+enzyme+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502817/normal_601d2f2ab9d76.pdfIn PDF document text
    • https://cdn.sqhk.co/nijusukelok/hjfdifG/v_moda_boom_pro_alternative.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/gjgeRhb/storm_lake_ia_population.pdfIn PDF document text
    • http://jasavutarapif.22web.org/refivurasonaro.pdfIn PDF document text
    • http://tuwuradozanava.iblogger.org/43638629824.pdfIn PDF document text
    • http://vajamerafimal.iblogger.org/do_cats_have_aspergers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_604181ac46278.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/cjdidPR/kixinojaloreko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_603d5f6377f38.pdfIn PDF document text
    • http://zuwazari.22web.org/how_to_apply_lubricant_to_elliptical.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/gdidYgg/tinkling_definition_synonym.pdfIn PDF document text
    • http://soxapisurer.22web.org/pudilemaxobufa.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/Mjfgdjc/jopeluwafigezep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/debiwelof/bosarikedutidapufib.pdfIn PDF document text
    • http://lumoripaluwikiw.rf.gd/sazemosako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f43e1f3-9574-4fad-8047-592f22932b69/how_to_change_kali_linux_user_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9764acbf-314d-4ce5-915b-073d13b82a44/pretty_little_liars_reboot_original_sin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e27cc6cd-bc4e-4224-b461-efed0fce005f/how_to_program_genie_remote_to_garage_door.pdfIn PDF document text
    • http://darafefe.rf.gd/fleetwood_rv_owners_forum.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/74550306471.pdfIn PDF document text
    • http://kavakino.epizy.com/what_does_white_out_mean_on_chest_x_ray.pdfIn PDF document text
    • http://gogositanisewu.rf.gd/regulatory_reporting_specialist_job_description.pdfIn PDF document text
    • http://nokarox.rf.gd/22075781850.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/are_extended_choke_tubes_worth_it.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_off0000c8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E4 5432 bytes
SHA-256: fff0e3a109495a3fdfc76f6f7cb3d7bd5b4dfd511f449682a6b02a965eb3ecf8
font_01_sfnt_off0000db5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5F 9680 bytes
SHA-256: 27b971911fbe93b798cfb1a1fcb6e7697215298b27d3db1b80d3e2215bee9ecd

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