Malicious PDF — malware analysis report

Static analysis result for SHA-256 b549f93e0d423311…

MALICIOUS

PDF

41.6 KB Created: 2020-11-09 05:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 748aea3d7959adf26dd3e0d643b218a8 SHA-1: b1543f2dbbf8df673111fab325856eef5caf1802 SHA-256: b549f93e0d423311265a8410276a6c2b099785c8c55a2d3caa07f8efbe08b7c5
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://traffine.ru/123?keyword=special+friends+birthday+quotes In PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/fikomuk.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/468d3abe39f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kaxemibewur.files.wordpress.com/2020/11/law_of_attraction_esther_hicks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d76c354-69e4-46f7-bd04-223d8a39348d/pigevegafulosibukokala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429813d9-8a5f-4620-9efa-960754ffd3bb/22056289717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add97688-c5e2-4c73-baaa-b3d6907e91e7/42503568201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acff1082-a7e4-44d2-abe3-ddf9813a679e/vakurak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d1ff86-5ae1-4d6b-bdaa-812d926638a8/96033289916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8b7c4a-4d64-4150-88e5-c7c0a2fd5f6c/towufujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ace7fd5-01e8-4eae-878d-b9f47c7da8ca/53324794761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b91deb-ed9d-48cb-9dc7-5bf14833df77/eromanga_sensei_ova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e52bdeb-c4bd-4b3e-8a87-04025733878b/happy_together_season_2_cancelled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7a8c65-2cac-439e-90d3-08ac3b619333/alicja_w_krainie_czarw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5b4d3d-de17-4fe6-aff6-d29ca25452ad/perception_process_stages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc34be5-65a0-4502-b512-8fe7b2d12ba5/51536675024.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_off0000632a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632A 5716 bytes
SHA-256: 9285329813c99f7369d6c2b78fc7d39fe4a249be19fc7d55f6568e9a67315f8f
font_01_sfnt_off00007696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7696 10088 bytes
SHA-256: 27018d2f2461478de00216383546c02026763011e1a1d6307e6f5852595eca84

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