Malicious PDF — malware analysis report

Static analysis result for SHA-256 2819d293bc5627c9…

MALICIOUS

PDF

38.1 KB Created: 2020-11-06 03:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ff6a03540ad481144583b2af01f77e1d SHA-1: c68aa736fc4654042d9e5263baa0151442521b9f SHA-256: 2819d293bc5627c9507abe4691ac3322cdf4bca02a72128c0a7a88d5e038e136
96 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of external links, many pointing to Weebly and AWS S3 domains, suggesting a link farm or SEO poisoning tactic. One of the primary URLs identified is https://traffset.ru/aws?keyword=kristen+boyle+california, which is likely intended to redirect users to malicious content. No scripts were extracted, but the PDF structure itself is used to host and present these numerous external links.

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://traffset.ru/aws?keyword=kristen+boyle+california PDF link annotation
    • https://kumevilowe.weebly.com/uploads/1/3/4/5/134598600/xagimavozefakukew.pdfIn PDF document text
    • https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/eb1f7f7598d5e30.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/lovovukibejuvomuzagu.pdfIn PDF document text
    • https://sufimaxunexex.weebly.com/uploads/1/3/4/3/134345405/wadonike.pdfIn PDF document text
    • https://vorenamu.weebly.com/uploads/1/3/4/2/134265490/voxoba.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/lizixid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_5f9b8c604489a.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/kapowapax-zasowo.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/8661809.pdfIn PDF document text
    • https://woxomeze.weebly.com/uploads/1/3/4/4/134498023/pimusewudodo_dumera_nomufepabenax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/najubu/borderlands_grinder_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/o_investidor_inteligente_autor_benjamin_graham.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/titanic_museum_branson_ghosts.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/wyndham_bentley_brook_massachusetts.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_off000053b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B7 5088 bytes
SHA-256: 721c67775dccf4bda155ead3f6f406b7230b424ef22e8d22ce837c5738fa4b47
font_01_sfnt_off00006526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6526 11372 bytes
SHA-256: 9e0e29f90fad368616f24ba77d8ed779197f3fb94c53788457785973a217f262

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