Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac98b0faf80e454…

MALICIOUS

PDF

39.3 KB Created: 2020-11-05 16:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 31159914aa5e9b95004ddfebe65c2211 SHA-1: d828b8cfe64bc22b66ddd5ea9f70be5a01717443 SHA-256: aac98b0faf80e45432aba303a6ced6d49b0a4a28a13e1c498b6e4a5f28f01f24
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://traffine.ru/123?keyword=papa+johns+pizza+lake+wales+fl PDF link annotation
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/zefoxuzopiduzopif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5f8ef9a606ddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_5fa3b3b700b70.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dibedamoka/retetiwamevet.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/gepamep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9625/1802/files/pezal.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/hotspot_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/subaru_brz_custom_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/nafew.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/organelles_involved_in_energy_conversion_are.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/14666669756.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_off00004cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CFE 4884 bytes
SHA-256: 60cadecc8f96d66dee19da1d1d6c83d01abe70d028178e73bce5f47a3c2ebe5e
font_01_sfnt_off00005da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA4 10804 bytes
SHA-256: b2680a6af2bdbd66ef3a48810961b23ce30fc3f1aa0d84554ae1b74a4895c381
font_02_sfnt_off00008296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8296 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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