Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b8e83b1af49ab6…

MALICIOUS

PDF

74.9 KB Created: 2021-03-24 11:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ed0f2e35642d83c70b2427a5c0395a84 SHA-1: 181a84c3dac03eb03d599607205a9b1986d80596 SHA-256: 38b8e83b1af49ab6682a405749477cb6b82e6e4fcec0ea1e68042d4d40577c00
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 0.9997

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
  • 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/strik?utm_term=argonauts+of+the+western+pacific+google+books PDF link annotation
    • http://lnstagram-help-businesss.com/uppababy_mesa_car_seat_jake_vs_jordanvhnly.pdfIn PDF document text
    • http://sberbank.link/cuori_heater_partsyapn9.pdfIn PDF document text
    • http://mgacessoria.online/what_do_the_words_pax_romana_mean_in_latins3vfo.pdfIn PDF document text
    • http://fuxofexafot.iblogger.org/pibuxikununifobar.pdfIn PDF document text
    • http://afracheat7.xyz/beyblade_metal_fusion_games_freec5cx4.pdfIn PDF document text
    • http://totalcreditreport.info/86158875730eq22j.pdfIn PDF document text
    • http://20970907.net/38874394315bumc2.pdfIn PDF document text
    • http://topcreditreport.info/xadabipigisuwuremurbmw.pdfIn PDF document text
    • http://fadopaduwovod.iblogger.org/oracle_database_sql_certified_associate_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_8fa4167a55a14c7e83a378cf97f2db1b.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_87177a3b0c574d7bb0698a3065684976.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0f4418-4239-4ffe-b09c-0c5c283b55fd/the_wind_in_the_willows_movie_1987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3d3e04-298c-4bbd-9701-d363830d2083/danby_ddr50b1bdb_dehumidifier_black_50_pint.pdfIn PDF document text
    • http://fukevitadej.epizy.com/ipg_carmaker_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/vowejosoladopabavo.pdfIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_d3c448580be04df8bdff0441770312c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/58365267150.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_52ee1974c80b473aac4459a854fdce0d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1f1639-0030-46dc-bd33-80efeb515acd/56532847775.pdfIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_2c1584b51925441286b345170f183099.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/justification_letter_for_late_submission_of_reports.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_off0000e4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B5 5564 bytes
SHA-256: 2e07db7858fbd4faf70721b62b4a381be1b4e7b31616fd39185be4b4719d439c
font_01_sfnt_off0000f7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B0 11388 bytes
SHA-256: b9dff4980c687eaec7cb8810b5eb0cf80075f94a44c46273407c7b8de7d70c5d

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