Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd9afabf5c21514…

MALICIOUS

PDF

40.5 KB Created: 2020-11-09 14:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 884a3d60a00dfe1881f0fc2e900aa2e2 SHA-1: d742f9c2031ca7123580bd583d1ec8991223e238 SHA-256: cbd9afabf5c215147cca093590de87d635d31640e0e79efb67b2cea3a027b4cc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?keyword=panasonic+viera+link+setup+amazon+prime PDF link annotation
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/5954b926bf2773.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/6746505.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/5066370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425514/normal_5fa8431f1a22f.pdfIn PDF document text
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/tekekaluja.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/gixuvobegemelob.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/ee2914ba-8633-4551-9d0c-59b83da9da38/givawibupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f228d50-4dca-4f14-94b2-ee346057210b/super_mario_seven_sages_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348ed644-e667-4d28-a467-de88d9859d70/california_dmv_commercial_driver_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37399e57-1ba5-4f6c-b949-7579e99b31fb/99167868970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d32fbb-1f31-4894-9e6f-d8f0ae9ea68b/chapter_23_summary_of_to_kill_a_mockingbird.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5cf22d5-cbff-4da0-9dd8-c78c2f5436f0/the_secret_life_of_bees_lily_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08850963-0e8a-4de6-9e61-9d6fa0f68980/descargar_canciones_de_los_inquietos.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_off00005d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D44 5256 bytes
SHA-256: 6dc5c7da7e3b210538f8b324ef73af47b9e4fe761644c7336c58f4e85c421542
font_01_sfnt_off00006f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1E 11224 bytes
SHA-256: d187392a66e9ddb06c13cfec406dc489db6bc78b173c02484917ca97f14720d2

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