Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d508f65e068675…

MALICIOUS

PDF

40.8 KB Created: 2020-10-03 07:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7fd4923816cc45184a4055c1f9d58ae7 SHA-1: f7bb60ebb88091a2460e88a8926820a04fec9f5e SHA-256: c5d508f65e0686754f57402ebbbb27b2f621d36033b4de45c53068dbe2b61649
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/pify?keyword=sims+4+english+voice+mod In PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/vafezutevepew.pdfIn PDF document text
    • https://site-1038971.mozfiles.com/files/1038971/gupidozato.pdfIn PDF document text
    • http://files.sacredseedreflections.com/uploads/1/3/1/0/131070452/8785629.pdfIn PDF document text
    • http://files.bhavanavaishnavi.com/uploads/1/3/1/6/131637147/nitav.pdfIn PDF document text
    • http://files.bredcowswrightlivestock.com/uploads/1/3/0/7/130739142/wufubinebewe.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/4d2a1d11-7c4b-47d0-a491-753a1e5aef2f/javovamimokuvoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42c2be9-d82d-4851-9396-9af3fcc644a4/veviliral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc88ab43-89ce-49fd-ba2c-a42de4f34c14/21266376773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d25c269-9a65-4ded-bb48-bee910f4e3ce/kanutuvazogukir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679cc22b-9997-4a40-b839-a5e3447f3d36/gegawugujinujupefuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a28c73-1b06-40a1-8673-1c645598a0f0/juratufigiramolekakelifas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2356b510-26a6-4de2-a114-d73e788795b2/72651473363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c8b112-9cef-42e9-8a72-629ca7b18551/latidosorobejigomoj.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_off00006221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6221 5296 bytes
SHA-256: fe0870c4c942464061d389570dc94d74bb7b0bb4585d39cc5dae26c15ac5f00f
font_01_sfnt_off00007413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7413 10168 bytes
SHA-256: e75b790188e08a58d3036bbfe1eebf68a0987b38d27ab4f15c27de8bdbd0e19f

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