Malicious PDF — malware analysis report

Static analysis result for SHA-256 88491410baf38418…

MALICIOUS

PDF

70.8 KB Created: 2021-02-23 17:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 33c3454cc81c97fa486a9aa979b378d4 SHA-1: 8b703b3ee9abc33772cff7113b62d2520eb21763 SHA-256: 88491410baf384184d73520f3987bb8754cae20505afa7dc9238fe7caa0f5119
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://seumenha.ru/wix?keyword=chp+dispatcher+study+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470232/normal_5fe9d81f4dff0.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/EigHjeS/sugavagite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_601b026960646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420224/normal_6013c3837c17e.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/pazovugal/best_wallpaper_in_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/activinspire_windows_7_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/georges_marvelous_medicine_by_roald_dahl.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/jiwupalixiwotigut.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/calculadora_de_conversion_de_mililitros_a_gramos.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/jaani_dushman_old_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/7036502744.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/koxotadobusenuzixa.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC776 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0000d76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76A 5312 bytes
SHA-256: c053529b8402af126225d4a2c3260cb6cc2a40a6ad896297c8510f778e8cd27e
font_02_sfnt_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 10864 bytes
SHA-256: 133fa8816e8689ae7a6948fdccf0355958bd3ce9369c47dc9bc5adfa97cf33e2

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