Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5c39cf581f1914…

MALICIOUS

PDF

71.4 KB Created: 2021-02-21 18:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 62b7b128a2298a84c4f9c238358a697a SHA-1: 1d9b903fd5387f92f47767c86aa97c5dbc86c756 SHA-256: aa5c39cf581f191423098f7771997ab5734d66481a022b6347c76ecc2c8cb82a
136 Risk Score

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
  • 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.
  • 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/123?utm_term=can+a+bullet+kill+an+elephant PDF link annotation
    • https://cdn.sqhk.co/mifopanikil/2ibjifq/transference_focused_psychotherapy_example.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412899/normal_5ff4c44e7ddab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413373/normal_6000fcfd5bae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_60206f3073025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gukabusigutuwo.epizy.com/95356091278.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/78569167562.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/tusabadopidazekabigoxapix.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/havoc_brothers_audio_songs_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/sexakopixoxid.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/46880565304.pdfIn PDF document text
    • http://fipomazuwasa.epizy.com/coqa_question_answering.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/wigojujimanaxadozinabuva.pdfIn PDF document text
    • http://loxometos.epizy.com/topopifi.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/wiziwewagosol.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/norikeze.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_off0000dcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC1 4740 bytes
SHA-256: 3f8a6dfb2a7a58c11d45d102f90adea86ac1a9b63f9667520be3526200eeb212
font_01_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 10476 bytes
SHA-256: 7b3e9d2fe739b0a7f48f4b9ccf023af854763d716c5be5e7f90e17d8e8a6dab8