Malicious PDF — malware analysis report

Static analysis result for SHA-256 25285ecd12c03a89…

MALICIOUS

PDF

81.7 KB Created: 2021-03-10 08:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d3b55a88570afc7b4de901c3dbb2f332 SHA-1: 3b71281aea8975cb3bb39c96c9b8a86427f39833 SHA-256: 25285ecd12c03a899929a97867919e0cda14df46a99b7069bad8e8e2ea0f78de
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/award?keyword=speaking+english+for+beginners+pdf PDF link annotation
    • https://cdn.sqhk.co/fodexuxefeba/jbYibl2/44933954868.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/araby_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/0obZpia/99326964439.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/verirejon/43370277576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/715305d9-f511-4bee-b48d-414f68902c7c/15848459376.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/what_are_asymptotes_of_rational_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/vigipov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6896bfe9-bbd1-4b21-b5c8-c795fdd62a94/smart_board_siding_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/fiparavubavavaj.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/heidi_bruno_ganz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af8475d-3c39-43e2-8547-e65e6be911e1/how_long_does_it_take_to_become_a_real_estate_agent_in_north_carolina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33085ee-8951-45a3-a7fe-37f1259aaad0/how_long_to_charge_kindle_before_it_turns_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63024802-3196-4350-8803-6f3b59880fab/jbl_lsr305p_mkii_5_powered_studio_monitors_pair.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/fugukagebeganugu.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/by_the_waters_of_babylon_part_2_analyzing_theme_quiz_quizlet.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_off00010434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10434 5608 bytes
SHA-256: 06c79099074943e48d8eee41aa68c777f340b70e4ee1dc1634703e4b6de506a9
font_01_sfnt_off0001173a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173A 10184 bytes
SHA-256: 2f376b3aec6afb7d45bfdf974af114c06f9c5d221f01f5957b408fcdfb219980