Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe8d4b0c7355c1e…

MALICIOUS

PDF

40.9 KB Created: 2020-10-03 21:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ba2993499b37a193f4cf3cee38638892 SHA-1: 13c2de8fcb36ab99ba29e8fd62738d4615533716 SHA-256: cfe8d4b0c7355c1e057fc34d84a0e089319aa6be2936c3199dc4bcd4f1fee12a
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://cctraff.ru/strik?keyword=uses+of+hydraulic+jump+pdf In PDF document text
    • http://files.theaquinashub.com/uploads/1/3/0/7/130775645/wepikonomagugaro.pdfIn PDF document text
    • http://files.paulaandersononline.com/uploads/1/3/0/7/130775055/fb4a1c823596b9.pdfIn PDF document text
    • http://kopowe.madjikpaints.com/uploads/1/3/0/7/130739284/84bf567b.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/97b45f14-f867-40fc-9171-78e5ed004a8f/febisifepar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5e14cc-4d3e-4485-b4b6-39341e0c3d50/17930164209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e09c68-a2d7-42c8-b794-938458729594/lukipepofibaxazuvorafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b128217-275b-47ea-9323-43b3e825d203/62755545600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3670/3900/files/supersu_latest_apk_mirror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8732/6110/files/acadia_middle_school_winnipeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/live_fit_trainer_phase_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0909/7384/files/diamondback_century_1_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/9590181549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af6bf94-7647-4ef9-8485-637814b81642/92045657903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a7d57c-84ce-42d0-87bc-0257f02c8bce/71344111124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950475ca-002c-453b-ab88-1a45a3560d8b/25356271339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/637d91b7-87a1-4dc9-a9cb-e50f00d7551e/3050444447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ef6fb9-8f24-4f49-a80e-9ac8b4ba7e68/97877602750.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6169 5564 bytes
SHA-256: 1c71b8dde8801fa69e95270316c0e76c49b52dbb6b00cc90d5b02164da00c568
font_01_sfnt_off0000743e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743E 10088 bytes
SHA-256: 386645cb367efb78ed3346afd9bcfd012bbfff9b69a6d66c943214384fe38976

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