Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3b6013de768876…

MALICIOUS

PDF

70.4 KB Created: 2020-11-11 05:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: a779f5c2b2dfaeb0076062bd032415ea SHA-1: 9fed00f02014f82d4617c99813bc8856f770c480 SHA-256: ad3b6013de768876ff2f7936a878d62b0eaabc159a2b8b284c6a3c047a5e6b32
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://trafffi.ru/123?keyword=church+bell+ringing+sound+effect PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420743/normal_5f96f2224dc13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416327/normal_5f95e4d1ef59f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f973eac0b2f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f8847cbbfb31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f874be500a8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5fa1be1e535ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5f93b7e44bc44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/titugome/david_yonggi_cho_tabernacle_prayer.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/bomovezekugewiji.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/boss_weakness_mega_man_x6.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/in_defense_of_food_an_eaters_manifesto.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/44652527148.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/melt_shop_nyc_midtown.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/49122667019.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/damobixojiwuke.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB950 5120 bytes
SHA-256: 75efdd97419a4b4a0ca7c9473a11766ce4b6a8739468d0debfd798befe169d74
font_01_sfnt_off0000caa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA6 11120 bytes
SHA-256: e00369f2e52f8c6dc5fcaae55ffbef3d0b12efc05c049f38ecdfd0f894d3e1ae
font_02_sfnt_off0000e9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DC 9988 bytes
SHA-256: 769ccf5b628c503b536d8133bcad1eb32ef4614da35618086a6f52e25dc14de5