Malicious PDF — malware analysis report

Static analysis result for SHA-256 8372e19862e079d7…

MALICIOUS

PDF

65.8 KB Created: 2020-11-20 23:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e54c728ebd271ba64579a5a07e678be6 SHA-1: 9b3777fc7f8c6404d4e7d0d1b23d31d99f0c0ab5 SHA-256: 8372e19862e079d79941276f7e9ba4f9d22abb9a253a34a33a5090c761d934ef
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=skullcandy+ink%2527d+wireless+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_5f95ba5083142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f993ce7c97f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f986a1c4aecc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e6874b-5e06-4d0b-a97b-0d39e506273e/d_d_4e_arcane_power_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03bf35ec-d347-47bd-9efa-5a4018893a3a/tales_of_the_fourth_grade_nothing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35854d64-a9fe-4cb7-abcb-78ade30b67c5/onkyo_tx_nr_646_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e859966-c4a2-47af-8c29-e872d38c3e8b/30474765568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0748162b-4d05-4b16-8aa7-9575f0b3ba2c/volleyball_tryout_drills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac189dd-513d-4145-a151-41438817d884/97486673835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e607ec-591c-454c-84cd-7eb9faef06d0/drupal_8_login_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/five_wishes_printable_copy_free_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2320e918-1ddb-40d0-9341-ddec6443b89e/cisa_review_manual_2016_free_downloa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea7d2d6-8df9-48ee-9da8-69f3706a9c63/erin_brockovich_movie_torrent.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_off0000c1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E3 5480 bytes
SHA-256: b8ce7fb88700e9b81e848ea25d7edae6673768cf7a268efeed905dd53918542b
font_01_sfnt_off0000d497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD497 11316 bytes
SHA-256: 7ea8a9699ca022bd2173363830965644a3df595120ee49f9b5d56e9f895d054b

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