Malicious PDF — malware analysis report

Static analysis result for SHA-256 02af51a8d9e203bd…

MALICIOUS

PDF

40.2 KB Created: 2020-04-06 13:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7104a856b1d7483fec4994680fac3aaf SHA-1: a08d34707a1639aed31d2f7a8ca5e4d2dce824fa SHA-256: 02af51a8d9e203bdd5c7a287f2f59c50b87e02c591f9434a3887d0b314f8ce89
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, embedding numerous external URLs. The primary heuristic indicates a mass of external PDF links, suggesting an attempt to redirect users to potentially malicious content or manipulate search engine results. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to drive traffic to external resources.

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 http://operationsalgorithms.com/uploads/1/3/0/5/130550973/130550973.html#las+cuentas+por+cobrar+son+activos+corrientes
    • http://sierrawineschool.net/uploads/1/3/1/3/131379949/tibuviwidewe.pdf
    • http://immigrationpartnersofflorida.com/uploads/1/3/0/5/130588653/2058697.pdf
    • http://bydesigns.net/uploads/1/3/0/7/130775252/nejefarepas.pdf
    • http://agape-physicaltherapy.com/uploads/1/3/0/5/130545957/185f7fe2.pdf
    • http://2-eaz.com/uploads/1/3/0/5/130588173/wuramudeg-fitalesaxefo.pdf
    • http://denverofficebroker.com/uploads/1/3/0/4/130476502/8b57b8.pdf
    • http://hybridhealth.ca/uploads/1/3/1/3/131383204/xelizegapozoji.pdf
    • http://mal-test.com/uploads/1/3/0/2/130289632/c683e16424.pdf
    • http://lukesguitartuition.com/uploads/1/3/0/6/130620859/6356850.pdf
    • http://juliandonbishop.com/uploads/1/3/0/7/130775868/maluwun.pdf
    • http://deeptok.com/uploads/1/3/1/3/131381982/5e29b236a37e04d.pdf
    • http://catholicswithattitude.com/uploads/1/3/0/4/130476736/5349325.pdf
    • http://pcclelectonics.com/uploads/1/3/0/6/130604086/8530835.pdf
    • http://tworamsdance.com/uploads/1/3/1/3/131379371/tozumufomuvolu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000725e.bin
400a37f0cbd3d9c773dda382befa7853b87d8578b12eddf5ca1a953a71e1d440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725E 8724 bytes

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