Malicious PDF — malware analysis report

Static analysis result for SHA-256 693ef39aed2221c8…

MALICIOUS

PDF

40.9 KB Created: 2020-10-17 04:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d2f2604ddae16e8c3874c6b2809093f8 SHA-1: a1a6dfae269349ab6203e8a650594b6d656e72d7 SHA-256: 693ef39aed2221c8c3edd317b450473454a1f81a7aae38e811b700d8b532f0be
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://gettraff.ru/123?keyword=animus+stand+alone+apk+obb+download In PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/guzefonugumabaw.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/4513276.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/99b134370fd.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/kiwofipegu-lolejumefige-punixobupaxuwu.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/notumefozekuxeg-rujaniludejad-lipivupeb-duruwus.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/votor.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/buzidu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/49561877075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0876/4321/files/loropexujebemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/the_twilight_zone_i_sing_the_body_electric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/jivuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5578/2309/files/positive_behavior_support_plan_templates_fill_in_the_blanks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f3f27bc-272a-4362-96b4-ee72eff2abe9/givorekosolaled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25eddc4b-9399-4afa-b13e-3079125c515a/apush_dbq_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2870e9-46f7-4322-9c32-15bfbee20cc1/77379098417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc18aa66-8eed-4a32-9587-e64881f0ec8d/15766783373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f9e757-2f10-4f78-b7cb-2e4d3a984581/19390897855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f971f35-0397-4d6b-b1cb-3748fc3c60dc/sevamivonalidum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46524f63-cf64-4d1e-95a5-189dd10c5cfb/86302061520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212e2bb2-117f-4128-98b7-5b688d955bbe/tidikiranititevaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b5cdb5d-5488-49cc-8c69-b0fcec8bb867/30084654086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876c16a0-4179-4a41-a69b-f5b06a2444ed/kowetituxarifat.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_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 5292 bytes
SHA-256: 9115c43640533508c6c0a31f283775539d378e94e0bc467411ad78243f4cb86e
font_01_sfnt_off00007311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7311 10224 bytes
SHA-256: 2b2a5973c1ec0896468c92e08a3da4dfeff5bf4199da0cff67b49d18f1ee3ae4