Malicious PDF — malware analysis report

Static analysis result for SHA-256 45249a9526513547…

MALICIOUS

PDF

128.9 KB Created: 2020-04-06 15:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1573cb0e52dc8d7786bd4309b1abc70a SHA-1: 8bd9d6c6fc911ba68feb6cab0f783fafa1196539 SHA-256: 45249a95265135472e85cd066e637fa77004a5253af844337d5d25f551c2f8a0
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though truncated, contains text related to IMEI reports and the wkhtmltopdf tool, suggesting a lure. The primary purpose appears to be directing users to a network of linked websites, likely for SEO manipulation or to serve as a distribution point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier clean score 0.1556

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://octoberfestmountaincreek.com/uploads/1/3/0/4/130435511/130435511.html#como+quitar+un+reporte+de+imei+2019
    • http://mmrai.org/uploads/1/3/0/8/130814250/409497.pdf
    • http://scratchdigitalpublishing.com/uploads/1/3/0/9/130969301/6055383.pdf
    • http://alexanderhaledesign.com/uploads/1/3/0/3/130313098/3c36d224c0.pdf
    • http://flapbackrecords.com/uploads/1/3/0/6/130620443/21b67074.pdf
    • http://goodsking.com/uploads/1/3/0/8/130814295/zedexumof_befodelejuw_sokigivijex.pdf
    • http://napoleon-rhodes.com/uploads/1/3/0/4/130483163/wexobe-goleposorerix-midowavuxuze-jazame.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018225.bin
0b5e6ab6ccc5392c140ffe9cf945a20da04ec592b42dfecdf941f5b9749a1a6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18225 6592 bytes
font_01_sfnt_off00019267.bin
2427fd394eb94dea74b7983453863ff2aa468d80b2a2db6a235030a9ebe77f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19267 12084 bytes
font_02_sfnt_off0001bb09.bin
a6a9a5c7a3a3b3fe1d287f2469acc83e86fbf0fa73408c94e7abae4ad052c47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB09 2820 bytes
font_03_sfnt_off0001c4f4.bin
556067bc89e1ccbd7215eda1e8fa1ddc70439dc44453e20a33d8f76e4579996e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4F4 9716 bytes
font_04_sfnt_off0001db33.bin
0f29cebfd1038886086dc34f1c1e9fcb6c17564f7ba539d5c8f07596fb0ba00a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB33 16944 bytes

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