Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1f1deb997f7ecb…

MALICIOUS

PDF

41.2 KB Created: 2020-11-07 19:35:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 984e5ce8cfce1852a3d590550ccc77e9 SHA-1: 96da74603c2ea444457540e0b3cb56ae68e7a8d4 SHA-256: 9a1f1deb997f7ecb18f9b3304491a00f87a7932a07c97b23a9675d14cb64a33c
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/aws?keyword=group+of+prairie+dogs+is+called+what In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/lupemu_lumivexojadojex_bubufudisujexi_logejilobarug.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/pazifetanegapu/catcher_in_the_rye_chapter_20.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/nikoderadetijirile.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/xanowurazadinesu.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/36543183836.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/83716796172.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/stem_career_fair_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/grilled_pork_chop_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/banana_seat_bicycle.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/the_only_exception_guitar_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/girl_from_random_chat_118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf0179e-fdd6-4fa5-b5f9-0ad45a4f6268/buffalo_linkstation_web_access.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_off000062d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 5540 bytes
SHA-256: f3753a153d25c6776d492fabb2f0b4cf9b6490cfd8f680c837ca2394e1af4531
font_01_sfnt_off000075bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75BD 10116 bytes
SHA-256: 8b9b091b78698d249f35d222a92f9fd95a475f7d36b839b3f4b0810ec001a286