Malicious PDF — malware analysis report

Static analysis result for SHA-256 495e1aeac0277844…

MALICIOUS

PDF

49.5 KB Created: 2020-04-20 22:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2021-02-20
MD5: 7b66b30e63f3bf8785fadb608e91cb17 SHA-1: 2c1cbea6e4c2c1c6f27ad818d57c1a7d7bb114da SHA-256: 495e1aeac027784499fffe12337ef99990d582a53b48e0f1f5930890cf0f653c
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://pvgconsulting.com/uploads/1/3/1/4/131437640/131437640.html#bixby+remap+android+pie PDF link annotation
    • http://embracehospicehouse.com/uploads/1/3/0/9/130968968/8140084.pdfIn PDF document text
    • http://beachfrontmarket.com/uploads/1/3/0/6/130605278/rivoji.pdfIn PDF document text
    • http://rawanrajab.com/uploads/1/3/1/4/131454052/kedafutokodaga.pdfIn PDF document text
    • http://repitup.com/uploads/1/3/0/6/130605291/4707669.pdfIn PDF document text
    • http://ritewayrides.com/uploads/1/3/0/6/130639257/fofidetojazedivulex.pdfIn PDF document text
    • http://linderdwyertherapy.com/uploads/1/3/0/3/130379065/40ff1dd.pdfIn PDF document text
    • http://thatgirlaccessories.com/uploads/1/3/0/5/130590392/fovonuna.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F5 8768 bytes
SHA-256: 437be479b958fe8067372a3c8f29731ea5c16289023a02272f937134ae21c756
font_01_sfnt_off0000a589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA589 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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