Malicious PDF — malware analysis report

Static analysis result for SHA-256 c789717a8447dec3…

MALICIOUS

PDF

45.9 KB Created: 2020-06-20 18:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db773cc80d23bcc0ba74c9106c63eba4 SHA-1: 2c81092b70f7d5ba8bd60c9d9be6bfe73cbf4a52 SHA-256: c789717a8447dec3abc5087aa6d584082e9bd1100b6be12a04f0df7b8918ead9
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution network. The ML classifier also strongly indicated maliciousness. The document body contains seemingly unrelated text about 'Cayenne manual transmission' and authoring application details, which are likely decoys.

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://hijabsstylesbysara.com/uploads/1/3/1/0/131071175/131071175.html#cayenne+manual+transmission
    • http://hzb-wegberg.com/uploads/1/3/0/8/130814226/juromilinobuso.pdf
    • http://schoolhomeconnect.com/uploads/1/3/0/3/130313826/nimeri.pdf
    • http://syakirahnoble.com/uploads/1/3/0/8/130813639/wugibudebusowasi.pdf
    • http://thewdwreport.com/uploads/1/3/0/5/130542907/3636641.pdf
    • http://aaafinance.net/uploads/1/3/0/7/130739476/783c9b.pdf
    • http://lindseyericksondesign.com/uploads/1/3/0/5/130544872/4922966.pdf
    • http://julesbartling.com/uploads/1/3/0/6/130621829/wopuxajofasapip-jaxefimadod-latidefig.pdf
    • http://pk-grills-wholesale-order.com/uploads/1/3/0/3/130323811/318433.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_off00007445.bin
21bcacbd81d50ddf76f7f40920cf94895dd6781243eb173f42a0a2ab1844e8a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7445 4836 bytes
font_01_sfnt_off0000849f.bin
91c0b26bcdc6f12eb13bba3129a2d547429dbf9838eda90416a0b2d34b2ee3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849F 10868 bytes

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