Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a30a47a6bf5116…

MALICIOUS

PDF

31.2 KB Created: 2020-04-06 13:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-12-25
MD5: d2b33d5a451e4e46d0e234dde647607d SHA-1: 661ed3362b028a59b39de5a6446c7f64700584fe SHA-256: 91a30a47a6bf511601bdea7ce405ebd3843d0cd8d5f082cd0c66076ab1867411
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 URLs that point to other PDF files, likely for SEO manipulation or to host further malicious content. The document body contains a lure related to a 'Pokemon white 2 rom download', suggesting a social engineering pretext to entice users to click on the embedded links. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://deadstockaus.com/uploads/1/3/0/7/130738524/130738524.html#pokemon+white+2+rom+download+exp+fix PDF link annotation
    • http://studiosarahdavies.com/uploads/1/3/0/4/130483230/3355138.pdfIn PDF document text
    • http://frisbeegolfgloves.com/uploads/1/3/0/7/130776026/nasazuxap-jovixewu.pdfIn PDF document text
    • http://bkmetkovic.com/uploads/1/3/1/3/131383602/b270a5b.pdfIn PDF document text
    • http://suppersreadytx.com/uploads/1/3/0/4/130436166/topuvusesuwi.pdfIn PDF document text
    • http://lesartisanstraiteur.com/uploads/1/3/0/7/130775737/filaxupapuvanuk.pdfIn PDF document text
    • http://snowbirdpicturesinc.com/uploads/1/3/1/4/131410434/8260c4.pdfIn PDF document text
    • http://danielleeministries.com/uploads/1/3/0/5/130544811/penexowejisojoguko.pdfIn PDF document text
    • http://earthkween.com/uploads/1/3/1/3/131398453/dozinigiwa.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51CE 7916 bytes
SHA-256: 8322b8b317a70bcef469744ee5705ab2a36b36551d715ae9897fe24eca461a72

Open this report in the interactive analyzer, or submit your own file for analysis.