Malicious PDF — malware analysis report

Static analysis result for SHA-256 122417bae15456af…

MALICIOUS

PDF

88.6 KB Created: 2021-03-26 02:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 628e46129206643e2755ac73ac63c38d SHA-1: d9d53ef35f45c4424287cf56ffd7b39aca39c18e SHA-256: 122417bae15456afbcc89d2c96634f7c23a90d78afbdaf9386a19de5ce7a73f0
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by multiple heuristics as a malicious redirector and phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is the primary indicator of compromise, likely leading to a phishing or malware download site.

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=characteristics+of+victorian+age+in+english+literature+pdf In PDF document text
    • http://pedagodogiko.getenjoyment.net/data_mining_concepts_and_techniques_4th_edition.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/61798377869.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/where_can_i_donate_baby_clothes_in_los_angeles.pdfIn PDF document text
    • http://bumadodari.iblogger.org/66263476120.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/80535317197.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaguvibetiw.epizy.com/heat_exchanger_tankless_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/humminbird_helix_5_sonar_fish_finder.pdfIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_259a64cedb594e6d8c8d9f8d4a8b248d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ditiruz/aggregator_transformation_questions.pdfIn PDF document text
    • http://dadokupokumudav.rf.gd/sibixubazirivivefoforira.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/oceanofpdf_new_domain_name.pdfIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_2dad21cdb311441997c370afbd15e85e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9f169d-302f-4357-8d10-eec27ed6fd97/87003840633.pdfIn PDF document text
    • http://fopivezefam.rf.gd/human_body_systems_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f1945c3-0852-4f2d-889c-f4fbbaba07f3/23503673721.pdfIn PDF document text
    • http://betitunusepa.epizy.com/64570694366.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/bhavans_baroda_app.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/90041091577.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_ef5ab78be39940f484472b9456528be4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0811d12b-6968-43e4-b3a9-139138df0dd8/of_plymouth_plantation_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/lafikerobinal.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D62 5384 bytes
SHA-256: bfe272fbd96dd2f96acd9dcfcfebbd6669c83acf6bd2f98c4cead8252e2eac86
font_01_sfnt_off00012fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAE 10876 bytes
SHA-256: d23a18f2196e8b2b569f373b31fe5f2c3d7a016a23abcf2946916d9535bd9d40