Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c922516223df0d2…

MALICIOUS

PDF

66.8 KB Created: 2020-12-31 13:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7bbf52710288b89377a5d42c75ac7a36 SHA-1: 93a2760c53f3f3f7445cc5ffcc642c20c24beba8 SHA-256: 7c922516223df0d20503204b1ef00b14d3396ce88e67d55c6d948408f73264f8
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://gettraff.ru/wb?keyword=ringtone%20for%20iphone%20download%20apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_5fab5e5c0d654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465147/normal_5fa6cde6e3c85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5fa491c6192a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_5f967638f04d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497348/normal_5fc322b7c24b3.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/wulagisi/history_of_liberation_war_of_bangladesh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74158946-1843-4af5-abcb-2f4ba05bcfe0/saguru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87111860-3c24-41dd-b82e-7f3b74b43183/fixulagetebiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/searching_movie_parent_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/299a6540-f2ec-44b0-a5c6-9b603f6ad518/nova_launcher_pro_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353e70c8-d37e-4ae0-969e-3d3d69320149/free_avast_driver_updater_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c94633cc-2e68-414b-b800-901caef5ad45/xofutirofibarutot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ad670d-caab-4841-b24f-5f21e0a97c8e/funaxuvagipobage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd785234-542f-4822-86db-75059b72b8df/gre_quantitative_reasoning_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b120843b-aa26-49b1-8fd8-443e8174dfe9/fupevejunigu.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_off0000ca0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0D 5288 bytes
SHA-256: 413ef952b1e6bdcb41f8fd4b6ede4bcb909126f5f952fd13d25a3c3ea3cacaa5
font_01_sfnt_off0000dc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC22 10100 bytes
SHA-256: 3fe756ecc5a47f6275b1dd650fd85d1475347a7750a14edcf131bb8de6cbe75f