Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a366563eb75b01…

MALICIOUS

PDF

51.3 KB Created: 2020-11-01 15:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 4916879c0ba12331b00c6969a9e96d84 SHA-1: 8a1104a8afdc607051d7f618f26421e9aff3cb23 SHA-256: 85a366563eb75b01a0a63bed6f7e75c583be0b6fde87ae3a3c374d97b827c0a4
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://ttraff.cc/123?keyword=stealth+cam+g42ng+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f871be293815.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/c68478389b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f8f4a50444ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5f8f15f5afdb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f89d819a52d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8f3b5d07cfe.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/megelugik/gamefole.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/campbell_biology_10th_edition_ebook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lanowilovuviwib/standing_female_nude_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/definicion_de_amigos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83435f22-0497-4d7a-9d3e-09007fbb8e41/wajilizegukabenumazekes.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/73698735733.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_off00007297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7297 5264 bytes
SHA-256: 257cdf52e085ffcb32ff9081d7d9a5ffe1330bb1e11d959313833c2c70d8b0ea
font_01_sfnt_off00008464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8464 11376 bytes
SHA-256: 341c69d1e1cfd1439ca8dd41f6391c74ffad2ac91e9fa1411bbca5c22be95a37
font_02_sfnt_off0000aadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAADF 16200 bytes
SHA-256: 2b5258c0b175a57b059b8250512850dcd08021e2e5aded74eefcb81f0e6b700c