Malicious PDF — malware analysis report

Static analysis result for SHA-256 6284546ec9313ffe…

MALICIOUS

PDF

39.7 KB Created: 2020-11-06 13:15:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ebdfa40310d02940899db22c4e49593e SHA-1: 97bfe1b4610b404a5c09b71b4ca042e0cb45d7dd SHA-256: 6284546ec9313ffeae015977564975c29049fa6c6099477721f5471f6c166fd3
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://traffnew.ru/aws?keyword=keto+bread+publix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f94b4ebb54e7.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/9bb4dcab-eb67-479c-88cc-16341202135b/lamidab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05389856-be15-4d81-b976-21b3139bd970/90374889259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2183/0824/files/60801892955.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/powaxat.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/aha_bls_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/63834787524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5994ea1c-3bd4-48d7-ada1-48c56fe014d6/12960207166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd25302-5231-4be5-aef7-b73502c82be6/tegikobofevibajata.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/mel_b_brutally_honest_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8321f318-a5ad-489c-8a50-10aa42bef38e/fasebadirudubinunumo.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/8_days_of_hanukkah_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d330ab12-ff1f-421d-981b-19d8a3a62d45/93863872907.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_off00005ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDD 4952 bytes
SHA-256: 6371ef7451cc7d3193246ae93eea0dcb66732921c43f90e9d2fdf026cc572087
font_01_sfnt_off00006ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC1 10452 bytes
SHA-256: 5c1294ccf8aeaabce84b61bdd4047ae6ccc5fa6203e22e2a6eeca1001295709f