Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cffb4ed3f35edbf…

MALICIOUS

PDF

67.7 KB Created: 2021-02-16 18:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bb6218dc364995a0e375e3181ff324c4 SHA-1: 195f31713ac2647aca2228b473553952c76018d8 SHA-256: 3cffb4ed3f35edbff349b67ea2489752824e7258c1229387fd6eaac30bab9a97
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=cracking+the+ap+us+history+exam+2018+pdf PDF link annotation
    • http://tuligofabuwisa.22web.org/arctic_circle_information_rovaniemi.pdfIn PDF document text
    • http://betabudon.iblogger.org/datasheet_arduino_mega_2650.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475562/normal_5fe0c6f399d1f.pdfIn PDF document text
    • https://tewedarutomos.weebly.com/uploads/1/3/2/3/132302993/7596330b2f2b4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381320/normal_6002bd995f79e.pdfIn PDF document text
    • http://jagodadexujuza.iblogger.org/material_safety_data_sheet_anhydrous_sodium_sulfate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sobezoneroli.epizy.com/nikisusanunit.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/adivasi_film_karen.pdfIn PDF document text
    • http://selifesupenikiv.epizy.com/personification_worksheet_4_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/contemplate_on_something_definition.pdfIn PDF document text
    • http://xatabiraluxuded.rf.gd/iphone_x_gestures_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/betternet_for_mac_free.pdfIn PDF document text
    • http://tunivepusage.epizy.com/berkheimer_lst_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/power_of_attorney_in_fact.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_off0000c642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC642 6196 bytes
SHA-256: fcdefcd5cf008b1cb4ed1a2de85759a07c56248d6e5aff6e64346f158ecae216
font_01_sfnt_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 11376 bytes
SHA-256: f406b61772a3a35705ce0cb34b9656c35228c6860a5a928444a66fcd633fb7b0