Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8a125624276def…

MALICIOUS

PDF

40.0 KB Created: 2020-04-05 15:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4886aa9a63fd9150d8090515e29805a3 SHA-1: 7901eb62059b5849725ee49e42b56539ca62803a SHA-256: 6d8a125624276def2fb736206fb55ba8ec8d3c4cedc59af19852cf38005f04e2
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. These links likely serve to manipulate search engine results or to distribute additional malicious payloads to unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://mamiew.com/uploads/1/3/0/9/130969245/130969245.html#ge+ultrasound+logiq+e9+manual
    • http://pixiechicks.net/uploads/1/3/0/5/130542727/tekajer.pdf
    • http://willowcreekleather.com/uploads/1/3/0/5/130543320/b58d3c591746b.pdf
    • http://suncityprides.org/uploads/1/3/0/4/130435594/merewubilis_wodixa.pdf
    • http://davidjeanconsulting.com/uploads/1/3/1/0/131069744/farodiliwaj-zijatitenanuka.pdf
    • http://houseofimani.net/uploads/1/3/0/4/130476505/a5115d62130bd1.pdf
    • http://2daycashoffer.com/uploads/1/3/0/6/130621397/3861781.pdf
    • http://savitripersonaltraining.com/uploads/1/3/0/7/130775515/wemagad.pdf
    • http://tottiescheaperelectronics.net/uploads/1/3/0/5/130551116/resodepusaguwo.pdf
    • http://rasterinterrupt.net/uploads/1/3/1/4/131407163/3052007.pdf
    • http://rsqadog.com/uploads/1/3/0/7/130739087/vajatogaponer_kopoz.pdf
    • http://fernandopessoainlisbon.com/uploads/1/3/0/3/130312944/bazipuperezelogu.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007077.bin
1c3f0c598ce886f7e3a2dda4f1c473b548d65a506ee1b70a7eda96d4ff294233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7077 8732 bytes

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