Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97e54cc842d834f…

MALICIOUS

PDF

40.9 KB Created: 2020-11-06 00:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e213e22c652bef3f7810b7268e6fd61b SHA-1: ac0ff4a5d0c2ffc80299ce033668e27eb49a4bed SHA-256: f97e54cc842d834f2e3170bdc1b7c7d8ae62d74c0673876b2d3bc67fe0a56394
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://traffking.ru/strik?keyword=how+to+get+free+chat+in+aj+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_5f95fa70d3db0.pdfIn PDF document text
    • https://munazuzane.weebly.com/uploads/1/3/4/3/134350045/tofatasixi_pimug_zomusoganexe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f8db4da32a38.pdfIn PDF document text
    • https://futubajo.weebly.com/uploads/1/3/4/6/134648917/e3754c5fb.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/16ee4642-1bee-4ea6-9b52-1d34b5cbfc2d/21191554470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a202b349-9ad8-4564-b6bc-207db3fdd021/vixomewivitebipefase.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/mevarujan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b895d48b-26ec-4df2-a797-377da3f1d978/3357879168.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/15220590064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e848352e-b618-4454-a593-347d2344aa5a/7392726391.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/11957977146.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_off00005a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A46 5544 bytes
SHA-256: 3fa793c4dc9fe323a396aa013c28f1bac106eff45a4c2fe867806f06747c87ad
font_01_sfnt_off00006d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D45 12348 bytes
SHA-256: 01f1ee89d6fd08b54d7382c22583b95beb5aaf9bf6f14ae324f3f15666eee188