Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2bd11c0f744714b…

MALICIOUS

PDF

71.9 KB Created: 2020-11-06 21:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1e47069e3943d22dc237c8964d8c6dad SHA-1: 2e2cc4e55d22209c183b448ff22000afc6dc519f SHA-256: f2bd11c0f744714b6474383427605ed13012061a34cc0e39bba53e87cbc05925
96 Risk Score

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://trafficel.ru/aws?keyword=the+rapid+fat+loss+handbook+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f95214ea9fdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5f89f47529fad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423188/normal_5fa15d8d1dc37.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/zebitajoze_lamadamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5f91ac422bd4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414169/normal_5f9895c675425.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/8e85a616-92f1-4050-aa27-4b14b503e4a3/giwize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c7d498c-b45c-4120-9ac5-3f7963867963/23206699578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/413e603c-eb87-4d53-bdbb-e3dc46b63449/contoh_proposal_bantuan_dana_pendidikan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd467ea6-2b61-46d8-b4b6-8ce1a0534e7b/dodge_ram_rumble_bee_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a085f85-f272-4ecc-bfad-c798ba598e15/87154509342.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23D 5284 bytes
SHA-256: 9cafc059f9ef18aeb419afdfbbbad233d0b134ee5c82ad146a9b1cf00572907d
font_01_sfnt_off0000e41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41A 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000eca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA8 11068 bytes
SHA-256: 3f8074d0104eadc126829f2ceddc59d1efb686b73028d4a2208f3311928d0af3