Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a9cb31dff39c16…

MALICIOUS

PDF

49.8 KB Created: 2020-11-08 20:30:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a7048b3e0baf0e4b3ad28b6d19972f81 SHA-1: b5fa7388250c758ebf111ed9a924ad71c8fd5987 SHA-256: d1a9cb31dff39c165fddc98882904321a6412fbc505d40c40f7289eb03ed76bb
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/aws?keyword=minecraft+theme+song+piano+notes In PDF document text
    • https://pamemigewoguvo.weebly.com/uploads/1/3/4/4/134438925/junebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5f9635a71a0c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f9ab9b11b914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f8a86aecab41.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/17906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f8762ca4d9b2.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/b9ffa21a4c5ab.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/lewuli/sauce_for_ham_and_cheese_sandwich.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/78633493442.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/amar_chitra_katha_new.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca700b68-8f51-4915-ae0f-dd024b2caca9/jujopipuzazodobi.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/bb_cyber_news_google_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/hamilton_beach_0.7_cu.ft._stainless_steel_microwave_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/bt_home_hub_2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/causes_of_antimicrobial_resistance.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_off0000823c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x823C 5400 bytes
SHA-256: 224fda3a683c64541789d8143129fc507e53f3723aed70c773cd25b63afffa9f
font_01_sfnt_off00009483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9483 11020 bytes
SHA-256: 4e04fde6da10b6d5e3d1b992e29f102f6757041aecdf5f6b2dc02bb1c1d95bbd