Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19a5a8a09e43280…

MALICIOUS

PDF

35.0 KB Created: 2020-04-05 12:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1b5b91845c3bc8cb3d49d7a538b13969 SHA-1: 659d04b56661df791e4e9021ffc4fd991671dcf8 SHA-256: b19a5a8a09e432807431296210f089ffa04b6e5dba52d758db0d7db38450108d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous unknown external URLs indicates a high likelihood of malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://davidmarquesibanez.com/uploads/1/3/1/3/131378779/131378779.html#bentley%27s+on+the+beach+casey+key
    • http://solsticeastrology.com/uploads/1/3/0/5/130538839/levefumuruvizi.pdf
    • http://farmmachinemower.com/uploads/1/3/0/2/130288359/rewetuz_kiveziz_wotexenuze.pdf
    • http://disneypremiereproperties.com/uploads/1/3/0/8/130874118/luwegopoti.pdf
    • http://mindyrbusiness.com/uploads/1/3/0/6/130620678/suxode-sodogavilibuk-xunubiwako.pdf
    • http://poolcleanerslb.com/uploads/1/3/0/8/130813768/japuti.pdf
    • http://themarylandweddingmarketplace.com/uploads/1/3/1/0/131070846/rowulovabojejudi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c1d.bin
fff9dbc16406c0dfee8d49ba5a0a79786dddbc2b1d83448b08c42daf52c4de6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C1D 7824 bytes
font_01_sfnt_off00006a6c.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6C 16036 bytes

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