Malicious PDF — malware analysis report

Static analysis result for SHA-256 26738ec2b59bfb16…

MALICIOUS

PDF

42.7 KB Created: 2020-10-29 23:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 346b83e1f3264fa2fd6b91d73cbc4644 SHA-1: 1568fc6b7b2ad6ed6a33a52d44842fcb21c25fb3 SHA-256: 26738ec2b59bfb16bfe3831a5926a84f13b2fd814fe58fc49ecee8738a972cf6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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.
  • 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/aws?keyword=here+comes+everybody+pdf In 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/88c9e120-8a99-4c6a-b846-25ae5d442224/45876010381.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/nakovuxipolej.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/57080540381.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/rowomajitabilofutemovu.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/calculo_estructural_ingenieria_civil_y_arquitectura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11bce28-d977-4cf6-965b-f67676bbd25b/webakarerabomatoxazaxexu.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/totuwuvafevo.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/numerical_aptitude_questions_and_answers_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e57b13-bf71-4a20-8547-713024dae474/71981394841.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/24186473591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9889/0150/files/xemenu.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/bivobebutifodadiboki.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_off00006a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A54 5324 bytes
SHA-256: f5635c259789963237c6e6e8fe63e7458d67d8fee04d075876f4dfc84646396e
font_01_sfnt_off00007c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5F 9828 bytes
SHA-256: 5a7d9f5b7eea97849978b4f49591f8e4cd6950a8dfc6fc085d80e334e569aadb

Open this report in the interactive analyzer, or submit your own file for analysis.