Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bda2e3c2285e377…

MALICIOUS

PDF

36.0 KB Created: 2020-11-09 08:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 618e1c96e91f68b09097365040fc5f71 SHA-1: 303638a6b50537af96e3bcb655d9713f9982c9b3 SHA-256: 8bda2e3c2285e377dc40f12c576122afd7500cd0ddffded7ba4b51f438e7dcbd
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/123?keyword=emperor+clock+company+model+100m+parts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8758cd7d71c.pdfIn PDF document text
    • https://gobiduromom.weebly.com/uploads/1/3/4/6/134660247/4314849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f875f00b58e1.pdfIn PDF document text
    • https://tuvomirunasoz.weebly.com/uploads/1/3/4/3/134324776/3718930.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/1c599936-3fa6-46ba-b97c-aaf8f67df5b1/24101687533.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/work_appropriate_one_liner_jokes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe6070d-28bb-467a-85bb-4af97273631d/5029514987.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/13414616797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/222ee3ba-c75c-4730-be71-d1ddc993a809/film_genres_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/78488936008.pdfIn PDF document text
    • https://meniluw.files.wordpress.com/2020/11/72888701979.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_off000049cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49CB 5536 bytes
SHA-256: 30fd89f38082e3a387eba0ff29c54e61b9a912bc7483ffb9f417f2ee1299008a
font_01_sfnt_off00005c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C96 11236 bytes
SHA-256: f663c29b8677c3b379e57ebe06454e89afd4edbffc2f56eeef44745bf009b046