Malicious PDF — malware analysis report

Static analysis result for SHA-256 99aa27e7366b409d…

MALICIOUS

PDF

80.8 KB Created: 2021-02-15 03:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 94df20cc37f07b5c7b53a18e9058f057 SHA-1: 987db7a330b565e90439b9036dc1fbd666b8a4a6 SHA-256: 99aa27e7366b409db86c726db8dbd16b45636859dac9fe40e52ad98ccdd95671
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=clairemont+high+school PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453906/normal_5ff7fd1e09805.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/djeiaia/rupokavitiwifapomet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_6019367c885eb.pdfIn PDF document text
    • http://papotanepif.22web.org/lesson_53_absolute_zero_kelvin_scale_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529281/normal_601832597b519.pdfIn PDF document text
    • http://zuragaretezi.iblogger.org/xodifibimef.pdfIn PDF document text
    • https://cdn.sqhk.co/dobulefipuji/RjhAihR/countries_of_the_world_flags_printable.pdfIn PDF document text
    • http://nomolizuxabid.22web.org/android_wear_app_apple_store.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/bidurudilidujug/case_files_surgery.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/fefudedidasiter.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/vosepalazaxolerobuzoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/ipcc_special_report_september_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/home_assistant_condition_template.pdfIn PDF document text
    • http://wegudewabeko.rf.gd/ledanutozinakujukag.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/traits_of_a_successful_entrepreneur.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_off0001010d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010D 5116 bytes
SHA-256: a689f6ca378b5966cad6d8ea5311eb7e56fc452a16318eb6f5df7b7979714c4e
font_01_sfnt_off00011247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11247 10624 bytes
SHA-256: fb99a1e674a28fc46340f8f466e343b3efed3cc11d17cf1294904f8fbd3028bf