Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17f869398143436…

MALICIOUS

PDF

46.4 KB Created: 2020-10-15 12:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2e10c19f5d010decb2e628b4a1edaf51 SHA-1: 16ab11eb273f84d37b9cbc54a4212f1fbcd92042 SHA-256: f17f869398143436418dc6b1aa3913d17464234edeeddbe34f739a3d48c0e16d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?keyword=army+mission+game+download+apk In PDF document text
    • https://site-1039492.mozfiles.com/files/1039492/wazokozuxi.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/18400973569.pdfIn PDF document text
    • https://site-1044453.mozfiles.com/files/1044453/97614763589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8736beb4322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f87e1a269edb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f87190a4d893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f8757b87c857.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/85177268-a1e4-49b2-9709-7236218173c4/75505471815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d01f10-2502-4770-bc7e-ab8c0567edd9/97093641863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf0855f-d316-4cc1-ba66-2deccddc8ff6/woranuwoxopusenexinesid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfbf6aa-2b31-43d6-b2bc-b8b0197f3b7e/nomuworigezoxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bace95f-6f77-4d90-bc46-329c62c2c805/gagogibavibedegibejubize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2254/8644/files/info_android_apk_itube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7739/3815/files/split_end_trimmer_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/achievement_habit_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b4d70c-5f74-4eec-a0c9-5533a94a5911/siroxikidizelebonulimup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3f7b25-e92f-432a-9ed8-886e383583ee/xatemuxexurosiwepome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63717fa4-c806-4986-b1c5-e6981d85ff4f/57098728096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1e985e-c11a-4a61-a936-bc425f272fb5/21821956796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed8a6a1-738c-4b0b-b191-a62b33dbf161/8414414419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57075e8-24f2-48bf-b5f5-4942fc6dd674/57055196889.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6200 5524 bytes
SHA-256: 22111f3012148d80950f27c2a9073ea4d0aebb22481c4cb984a305d492248fb6
font_01_sfnt_off000074c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C9 9868 bytes
SHA-256: 4f888d97c59e60bca62829097690d18180149b5152891a8b712588328789aa7f
font_02_sfnt_off000096ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AB 16196 bytes
SHA-256: fd2e26fc2f803dcf07b0b58048f95075aa07ade0877caf7b60c502d13bd4189b